Editing Line 1 (Beijing Subway)

{{Short description|Metro line in Beijing, China}}
{{Infobox rail line
| name                            = 
| other_name                      = M1 (planned name)<br />Fuba line ({{zh|s=复八线}}, for {{stl|BJS|Fuxingmen}} to {{stl|BJS|Sihui East}} section)
| logo                            = BJS Line 1 icon.svg
| logo_width                      = 100px
| color                           = {{rcr|BJS|1}}
| image                           = File:01 010 entering Sihui (20210421103855).jpg
| image_width                     = 300px
| image_alt                       = 
| caption                         = A Line 1 train entering [[Sihui station]]
| type                            = [[Rapid transit]]
| system                          = [[Beijing Subway]]
| status                          = Operational
| locale                          = [[Chaoyang District, Beijing|Chaoyang]], [[Dongcheng District, Beijing|Dongcheng]], [[Xicheng District|Xicheng]], [[Haidian District|Haidian]], and [[Shijingshan District|Shijingshan]] districts<br />[[Beijing]]
| start                           = {{stl|BJS|Gucheng}} ({{stl|BJS|Pingguoyuan}} reopening TBD, {{stl|BJS|Fushouling}} opens TBD)
| end                             = {{stl|BJS|Sihui East}}
| stations                        = 23 (not accounting for Batong Line, but including Gaobeidian)
| routes                          = 
| daily_ridership                 = 1,234,900 (2014 Avg.)<ref>{{cite web|url=http://www.bjsubway.com/support/cxyd/klxx/|script-title=zh:客流信息|access-date=2015-03-20|publisher=Beijing Subway|archive-date=2015-03-30|archive-url=https://web.archive.org/web/20150330140444/http://www.bjsubway.com/support/cxyd/klxx/|url-status=dead}}</ref> <br /> 1,536,900 (2014 Peak)<ref>{{cite web|url=http://news.sina.com.cn/c/2012-0429/165124349033.shtml|title=Ridership|publisher=Sina|access-date=2012-05-03}}{{dead link|date=December 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{cite web|url=http://www.bjsubway.com/node/2636 |title=Official Ridership |publisher=Beijing Subway |access-date=2012-05-04 |url-status=dead |archive-url=https://web.archive.org/web/20120502232735/http://bjsubway.com/node/2636 |archive-date=2012-05-02 }}</ref>
| open                            = {{Start date and age|1971|01|15}}
| close                           = 
| owner                           = 
| operator                        = Beijing Mass Transit Railway Operation Corp., Ltd.
| character                       = Underground, at-grade{{efn|The section from Sihui to Sihui East is at-grade.}}
| depot                           = Guchenglu, Sihui Depots<ref>{{cite book|author=Gao Yucai (高毓才) |location=Beijing |publisher=China Railways Press (中国铁道出版社) |script-title=zh:建设中的北京地铁——地铁"复一八"线|year=1999|pages=13|isbn=7-113-03381-4}}</ref><ref>{{cite journal|author=Pan Xiaojun (潘晓军) |script-title=zh:北京地铁1号线运输能力挖掘研究|journal=交通运输系统工程与信息 |year=2013|volume=13|issue=4|pages=200–204}}</ref>
| stock                           = 6-car Quasi-Type B (DKZ4, SFM04)
| linelength                      = {{convert|31.04|km|mi|abbr=on}}<ref name=bjnews201611>{{cite web|url=http://www.bjnews.com.cn/feature/2016/11/16/423590.html|date=2016-11-16|title=八通线与1号线贯通？年底见分晓|work=bjnews.com.cn}}</ref>
| tracklength                     = 
| gauge                           = {{RailGauge|sg}}
| speed                           = 80 km/h (maximum service speed)
| elevation                       = 
| website                         = 
| map                             = {{Beijing Subway/1}}
| map_state                       = collapsed
}}
'''Line 1''' of the [[Beijing Subway]] ({{zh|s=北京地铁1号线|p=Běijīng dìtiě yīhào xiàn}}) is the oldest and one of the busiest lines of Beijing's [[rapid transit|mass transit]] rail network.  The line runs underneath [[Chang'an Avenue]], the city's grand east–west thoroughfare, right through the heart of Beijing with stops on either side of [[Tiananmen Square]]. Line 1's color is dark red. [[Through operation]] with the [[Batong line]] started on August 29, 2021.<ref name=bjd20210825 />

==Ridership==
As the oldest line of the Beijing Subway, Line 1 was also the most heavily used from the time the subway opened in 1971 until January 2013, when the near-completion of the [[Line 10, Beijing Subway|Line 10]] loop caused ridership on that line to surge past Line 1.  Daily ridership averaged 1,234,900 in 2014.<ref>{{cite web|url=http://www.bjsubway.com/support/cxyd/klxx/|script-title=zh:客流信息|access-date=2015-03-20|publisher=Beijing Subway|archive-date=2015-03-30|archive-url=https://web.archive.org/web/20150330140444/http://www.bjsubway.com/support/cxyd/klxx/|url-status=dead}}</ref> Peak ridership in 2014 was 1,536,900.<ref>{{cite web|url=http://news.sina.com.cn/c/2012-0429/165124349033.shtml|title=Ridership|publisher=Sina|access-date=2012-05-03}}{{dead link|date=December 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{cite web|url=http://www.bjsubway.com/node/2636 |title=Official Ridership |publisher=Beijing Subway |access-date=2012-05-04 |url-status=dead |archive-url=https://web.archive.org/web/20120502232735/http://bjsubway.com/node/2636 |archive-date=2012-05-02 }}</ref>

Recent traffic relief efforts have been completed in recent years. The opening of the first phase of the parallel [[Line 6, Beijing Subway|Line 6]], caused an 8.46% decrease in daily demand and a 10-20% reduction in peak flow during rush hour.<ref name="ridership">{{cite news|url=http://www.bjjtw.gov.cn/gzdt/ywsds/201302/t20130207_71407.htm |script-title=zh:我市轨道交通网络化运营效果凸显|date=2013-02-07|access-date=2013-09-15|archive-url=https://web.archive.org/web/20140109144501/http://www.bjjtw.gov.cn/gzdt/ywsds/201302/t20130207_71407.htm|archive-date=2014-01-09|url-status=dead |publisher=Beijing Municipal Transportation Committee (北京市交通委员会) }}</ref> In addition Beijing BRT line 2 parallels the eastern section of Line 1. In the meantime between 2014 and 2015, Line 1 again upgraded its signals to a [[communications-based train control]] system allowing trains to run at headways as low as 1 minutes 45 seconds. However, during peak hours, sections of the line were reported in 2013 to still operate above 100% capacity.<ref name="ridership" />

==Hours of operation==
The first east-bound trains departs from [[Gucheng Station|Gucheng]] at 4:58{{nbsp}}am and [[Pingguoyuan Station|Pingguoyuan]] at 5:10{{nbsp}}am.  The first west-bound train departs [[Sihui Station|Sihui]] at 4:56{{nbsp}}am and [[Sihui East Station|Sihui East]] at 5:05{{nbsp}}am. The last east-bound train leaves Pingguoyuan at 10:55{{nbsp}}pm.  The last west-bound train leaves Sihui East at 11:15{{nbsp}}pm.<ref>[http://www.bjsubway.com/chinese_ver/cczn/TimeTableDetails.asp?TimeID=10] {{webarchive|url=https://web.archive.org/web/20081024204230/http://www.bjsubway.com/chinese_ver/cczn/TimeTableDetails.asp?TimeID=10|date=October 24, 2008}}</ref>

==Route==
Line 1's western terminus is {{stl|BJS|Pingguoyuan}}, located in [[Shijingshan District]]. The line heads southeast to its second stop at Gucheng and from there runs straight east, following [[Chang'an Avenue]] all the way to its eastern terminus, {{stl|BJS|Sihui East}} in [[Chaoyang District, Beijing|Chaoyang District]], just beyond the [[4th Ring Road]].  The line passes through [[Xidan]], [[Wangfujing]] and [[Dongdan, Beijing|Dongdan]], among other important commercial centers of [[Xicheng District|Xicheng]] and [[Dongcheng District, Beijing|Dongcheng District]]s, as well as the [[Beijing CBD]] near the [[China World Trade Center]]. The line is {{convert|31.04|km|abbr=on}}<ref name=bjnews201611 /> in length with 23 stations in operation. All stations except for {{stl|BJS|Sihui}} and {{stl|BJS|Sihui East}} are underground.

==Stations==
Station list for Line 1 and Batong line of Beijing Subway, after the through operation started on August 29, 2021.<ref name=bjd20210825 /><br />
{{Line 1 and Batong line of Beijing Subway}}

==History==
[[File:YUQUANLU Station 20181117.jpg|thumb|right|[[Yuquan Lu station]], Opened on August 5, 1971. The first phase of the Beijing subway project groundbreaking ceremony was held west of Yuquanlu Road.]]
The first section of subway in Beijing officially started trial operation on January 15, 1971. It was {{convert|10.7|km|abbr=on}} long and ran between [[Beijing railway station]] to {{stl|BJS|Gongzhufen}},{{efn|name=Lixin|In 1970s, Gongzhufen was called Lixin (立新)}} which today is a section of Line 1 and 2.<ref name="地铁大事记2">{{cite web |url=http://www.bjsubway.com/node/1842 |script-title=zh:地铁公司大事记1971--1980年 |publisher=Beijing Subway}}</ref> A few months later, on August 15, 1971, the line was extended 3 stations west, to {{stl|BJS|Yuquanlu}}. The line was extended again to {{stl|BJS|Gucheng}} in November. On April 23, 1973, the line was extended {{stl|BJS|Pingguoyuan}}, at this point the line is {{convert|23.6|km|abbr=on}} long with 17 stations.<ref name="地铁大事记2" /> On September 15, 1981, the line was again extended westward to {{stl|BJS|Fushouling}} creating a {{convert|27.6|km|abbr=on}} long line with 19 stations. The line was transferred to the newly created Beijing Mass Transit Operation Corporation and was officially opened to the public, ending the decade long trial operation period. By 1981, the annual passenger volume of Beijing Subway was 64.66 million passengers, with a daily average of 177,000 passenger trips.<ref>{{cite web|url=http://www.bjsubway.com/node/1840|script-title=zh:地铁公司1981--1990年地铁大事记|access-date=2011-02-03|archive-date=2011-01-01|archive-url=https://web.archive.org/web/20110101042234/http://www.bjsubway.com/node/1840|url-status=dead}}</ref>

On August 15, 1986, the second phase of subway construction started and a feasibility study on the construction of the new line between of Fuxingmen to Bawangfen (Today's [[Beijing central business district|Beijing CBD]]) was carried out.  A new branch heading east to a new station, {{stl|BJS|Fuxingmen}}, was completed between {{stl|BJS|Nanlishilu}} and {{stl|BJS|Changchunjie}} stations on December 28, 1987. The section between {{stl|BJS|Changchunjie}} and {{stl|BJS|Beijing Railway Station}} was transferred to the newly created [[Line 2 (Beijing Subway)|Line 2]] and Line 1 ran between Pingguoyuan and Fuxingmen stations. In January 1991, the feasibility study report on the construction of a new line between Fuxingmen to Bawangfen was approved with construction of the new "Fuba line", starting in June 1992. On December 12, 1992, Line 1 was extended east for one station to {{stl|BJS|Xidan}}. In 1994, Line 1's signals were upgraded to [[automatic train protection]] system.<ref name="地铁大事记4">{{cite web |url=http://www.bjsubway.com/node/1838 |script-title=zh:地铁公司1991--2000年大事记 |publisher=Beijing Subway |access-date=2011-02-03 |archive-url=https://web.archive.org/web/20110131123657/http://www.bjsubway.com/node/1838 |archive-date=2011-01-31 |url-status=dead }}</ref> On September 28, 1999, the first section of the Fuba line between {{stl|BJS|Tian'anmen West}} to {{stl|BJS|Sihui East}} was opened. On June 28, 2000, the section between {{stl|BJS|Xidan}} and {{stl|BJS|Tian'anmen West}} stations opened, merging Line 1 and the Fuba Line to create a {{convert|31|km|abbr=on}} line with 23 stations.<ref name="地铁大事记4" />

{| class="wikitable" style="border-collapse: collapse; text-align: right;"
!Segment!!Commencement!!Length!!Station(s)!!Name
|-
|style="text-align: left;"| Gongzhufen — Beijing Railway Station
| 1 October 1969{{efn|name=trial|15 January 1971 - Initial line began operation on a trial basis.}}
| {{convert|10.7|km|mi|2|abbr=on}}
| 10
|style="text-align: left;"| Phase 1 (initial section)
|-
|style="text-align: left;"| Yuquan Lu — Gongzhufen
| 5 August 1971
| {{convert|4.9|km|mi|2|abbr=on}}
| 3
|style="text-align: left;"| Yuquan Lu extension
|-
|style="text-align: left;"| Gucheng — Yuquan Lu
| 7 November 1971
| {{convert|5.4|km|mi|2|abbr=on}}
| 3
|style="text-align: left;"| Gucheng extension
|-
|style="text-align: left;"| Pingguoyuan — Gucheng
| 23 April 1973
| {{convert|2.6|km|mi|2|abbr=on}}
| 1
|style="text-align: left;"| Pingguoyuan extension
|-
|style="text-align: left;"| Nanlishilu — Fuxingmen
|rowspan="2"| 28 December 1987
| {{convert|0.4|km|mi|2|abbr=on}}
| 1
|rowspan="2" style="text-align: left;"| Line 1 & 2 realignment project
|-
| style="text-align: left;" | Changchun Jie — Beijing Railway Station
| {{convert|-6.1|km|mi|2|abbr=on}}
| -6
|-
|style="text-align: left;"| Fuxingmen — Xidan
| 12 December 1992
| {{convert|1.6|km|mi|2|abbr=on}}
| 1
|style="text-align: left;"| Xidan extension
|-
|style="text-align: left;"| Tian'anmenxi — Sihuidong
| 28 September 1999
| {{convert|10.1|km|mi|2|abbr=on}}
| 10
|style="text-align: left;"| Fuba line
|-
|style="text-align: left;"| Xidan — Tian'anmenxi
| 28 June 2000
| {{convert|1.3|km|mi|2|abbr=on}}
| 2
|style="text-align: left;"| Line 1 & Fuba line merging project
|}

{|
|-
| [[Image:Wangfujing station 01.jpg|thumb|220px|left|Line 1 train at Wangfujing in 2007.]]||[[File:East reservation of Xidan Station, Line 1.jpg|thumb|200px|left| In 1992, Line 1 was extended east one station to Xidan.]]||[[Image:Beijing Subway Line 1 Tiananmen East Station.JPG|thumb|200px|left|Platform of Tian'anmen East station]]||
|}

=== Headway Reduction ===
Since 2014, the signaling and power systems has been gradually upgraded to allow for trains to run more frequently.<ref>{{Cite web |title=北京地铁1号线发车间隔有望再快5秒 为世界最快 |url=http://news.sina.com.cn/c/2015-02-05/021931483535.shtml |access-date=2022-06-15 |website=news.sina.com.cn}}</ref> The upgraded CBTC moving block signaling system in place today reduces rush hour headways from every 2 minutes and 5 seconds to 1 minute 45 seconds.<ref name=":0">{{Cite web |script-title=zh:北京地铁1号线、5号线、10号线年底最快两分钟一趟-新华网 |url=http://news.xinhuanet.com/politics/2015-09/26/c_128269673.htm |access-date=2017-12-31 |website=news.xinhuanet.com}}</ref>

===Platform screen doors===
[[File:WUKESONG Station Platform 20181110.jpg|thumb|In 2017, [[platform screen doors]] were installed on the platform of Line 1.]]

Due to platform congestion and suicides, a proposal was made in 2010 to refit all stations on Line 1 with [[platform screen doors]].<ref>{{cite web |url=http://news.sohu.com/20100406/n271336388.shtml |script-title=zh:北京地铁1号2号13号线和八通线将装站台安全门 |publisher=[[Sohu]] |date=2010-04-06}}</ref> However, the ventilation system in the older stations of Line 1 was incompatible with full-height [[platform screen doors]], so half height platform screen doors were chosen instead.<ref>{{cite web |url=http://www.dzwww.com/rollnews/news/201007/t20100704_6274883.htm |script-title=zh:北京地铁老线加装站台安全门已进入论证阶段 |access-date=2013-03-09 |archive-url=https://archive.today/20130410182501/http://www.dzwww.com/rollnews/news/201007/t20100704_6274883.htm |archive-date=2013-04-10 |url-status=dead }} 大众网 2010-07-04</ref>  In July 2016, the operator began installing platform screen doors on Line 1.<ref>{{cite web|url=http://www.chinadaily.com.cn/beijing/2016-07/19/content_26157367.htm|title=Beijing begins installing platform barriers on subway Line 1|agency=[[Xinhua]]|work=[[China Daily]]|date=2016-07-19|access-date=2019-07-11}}</ref> In 2016, the [[platform screen doors]] was installed at [[Yong'anli station]].<ref>{{Cite web|url=http://jiangsu.china.com.cn/html/finance/finances/6952635_1.html|script-title=zh:北京地铁1号线站台门 开关2000次后"上岗" - 财经新闻 - 中国网•东海资讯|website=jiangsu.china.com.cn|access-date=2016-08-18|archive-url=https://web.archive.org/web/20160821050436/http://jiangsu.china.com.cn/html/finance/finances/6952635_1.html|archive-date=2016-08-21|url-status=dead}}</ref> By the end of 2017, all stations except {{stl|BJS|Pingguoyuan}} were retrofitted with half-height platform screen doors, and all the screen doors were put into operation for the first time.<ref>{{Cite web|url=http://news.sina.com.cn/c/2017-09-10/doc-ifyktzim9373761.shtml |script-title=zh:1号线全线安全门今日投用 北京地铁全线安全门全部启用|website=news.sina.com.cn |date=2017-09-10 |access-date=2017-11-09}}</ref>

===Through operations with the Batong line===
[[File:LCD route display on 01 0366 (20210527174608).jpg|thumb|Route display reserved for through service from Pingguo Yuan to Universal Resort]]
In 2010, a CPPCC member Chen Dingwang, proposed that services on Line 1 and the [[Batong line]] should directly link, with [[Through train|through operations]], reducing travel times and removing the unnecessary forced transfers at {{stl|BJS|Si Hui Dong(E)}} or {{stl|BJS|Si Hui}}.<ref>{{cite web |url=http://www.china.com.cn/economic/txt/2011-09/16/content_23426447.htm |script-title=zh:北京地铁八通线一号线有望贯通 |publisher=中国网 |date=2011-09-16}}</ref> However, the [[Beijing Subway]] responded that Line 1's and Batong's [[Railway signalling|signal]] systems are completely different, so through-operation will be more difficult to achieve, from an engineering standpoint. As of 2016, preliminary design and feasibility studies are underway to allow for through operations between Line 1 and Batong.<ref>{{Cite web|url=http://finance.qianlong.com/2016/1114/1109977.shtml |script-title=zh:北京八通线南延工程初步设计顺利通过评审-千龙网·中国首都网|website=finance.qianlong.com|access-date=2016-11-17}}</ref> On June 12, 2020, the project of the through operation of Line 1 and Batong line was approved by Beijing Development and Reform Commission.<ref>{{cite web|url=http://fgw.beijing.gov.cn/fgwzwgk/ysqzzdgk/202006/t20200612_1923647.htm|title=关于轨道交通1号线与八通线贯通运营工程项目建议书（代可行性研究报告）的批复|work=Beijing Development and Reform Commission|date=2020-06-12|access-date=2020-06-19}}</ref> [[Through operation]] with the [[Batong line]] started on 29 August 2021.<ref name=bjd20210825>{{cite news|url=https://news.bjd.com.cn/2021/08/25/159146t100.html|title=四惠四惠东站无须换乘了！北京地铁1号线、八通线本周日跨线运营|work=[[Beijing Daily]]|date=2021-08-25|accessdate=2021-08-25|archive-url=https://web.archive.org/web/20210825092946/https://news.bjd.com.cn/2021/08/25/159146t100.html|archive-date=2021-08-25}}</ref>

==Other facilities==
Rolling stock for Line 1 is parked and maintained at Gucheng Depot and Sihui Depot.

==Restricted stations==
{{main|Beijing Subway restricted stations}}
Beyond {{stl|BJS|Pingguoyuan}}, Line 1 extends further northwest where it has [[Restricted stations of Line 1, Beijing Subway|several other stations]]: Gaojing ({{lang|zh-hans|高井}}) and [[Fushouling station|Fushouling]] ({{lang|zh-hans|福寿岭}}). Gaojing station is in the military region. [[Fushouling station]] is actually outside the military region. These stations are not open for public use.

[[Fushouling station]]'s opening date is yet to be determined.<ref name=Beijingdaily2023 /><ref name=:01>{{cite web|url=http://liuyan.people.com.cn/threads/content?tid=9597937|title=1号线福寿岭站进度到底如何，今明两年能否启用|date=2021-03-24|quote=北京市基础设施投资有限公司回复：经核实，目前公司正在政府部门的组织下开展福寿岭站启动的前期工作，计划2021年开工，建设期一到两年}}</ref>

A proposal to open the Gaojing station to public is mentioned within 2022 and 2023 working plan of the [[Shijingshan District]].<ref name=Beijingdaily2023>{{cite web|url=https://bj.bjd.com.cn/5b165687a010550e5ddc0e6a/contentShare/5b16573ae4b02a9fe2d558f9/AP63b6ae04e4b0fb99eeb2fa00.html|title=北京地铁1号线福寿岭站年内竣工！高井站开启改造研究|trans-title=Beijing Subway Line 1 Fushouling Station to be completed within the year! Renovation study on Gaojing station will also start. |date=2023-01-05|archive-url=https://web.archive.org/web/20230124025617/https://bj.bjd.com.cn/5b165687a010550e5ddc0e6a/contentShare/5b16573ae4b02a9fe2d558f9/AP63b6ae04e4b0fb99eeb2fa00.html|archive-date=2023-01-24}}</ref><ref name=shijingshan2022>{{cite web|title=石政发〔2022〕1号 北京市石景山区人民政府关于印发2022年折子工程的通知|url=http://www.bjsjs.gov.cn/gongkai/zwgkpd/zcwj_1940/202201/t20220117_46863_sjs.shtml|archive-url=https://archive.today/20221024030334/http://www.bjsjs.gov.cn/gongkai/zwgkpd/zcwj_1940/202201/t20220117_46863_sjs.shtml|url-status=dead|archive-date=October 24, 2022|quote=26.启动地铁1号线高井站前期研究。 牵头领导：齐春利 主责单位：区西部建设办}}</ref>

==Future Development==
===Increasing capacity===
[[File:Tian'anmen_East_Station_End_Platform.jpg|thumb|The platforms of some Line 1 stations are longer than the trains used on the line.]]

Due to Line 1's severe overcapacity problem, there are plans to introduce 7-car or longer trains. In order for this plan to proceed the oldest section of Line 1 between {{stl|BJS|Pingguoyuan}} and {{stl|BJS|Nanlishilu}}, which only has platforms long enough to accommodate 6-car trains, will need to be lengthened. The newer section between {{stl|BJS|Fuxingmen}} and {{stl|BJS|Sihui East}}, formerly known as "Fuba line" during construction, has platforms long enough for 8-car trains.<ref>{{Cite web |date=2013-12-30 |title=北京地铁1号线6节车厢将扩至7节  |url=http://news.ifeng.com/mainland/detail_2010_12/31/3804565_0.shtml |access-date=2021-12-02 |website= |archive-url=https://web.archive.org/web/20131230234813/http://news.ifeng.com/mainland/detail_2010_12/31/3804565_0.shtml |archive-date=30 December 2013 |url-status=dead}}</ref><ref>{{cite journal|author=潘晓军|year=2013|title=北京地铁1号线运输能力挖掘研究|journal=交通运输系统工程与信息|volume=13|issue=4|pages=200–204}}</ref> According to an interview to the director of Beijing Municipal Transport Commission in December 2022, they will introduce 7-car trains in the eastern section of Line 1 and the Batong line in future.<ref>{{cite web|url=https://www.mot.gov.cn/zxft2022/csfzx/|title=北京城市副中心：如何实现不依赖小汽车也能便利出行？——访北京市交通委员会主任 谢正光|quote=将1号线东段和八通线由6辆编组扩大至7辆编组|date=2022-12-26|archive-url=https://web.archive.org/web/20230204235412/https://www.mot.gov.cn/zxft2022/csfzx/|archive-date=2023-02-04}}</ref>

===Branch to Qinglonghudong===
On 8 July 2022, an EIA document regarding Phase III construction of Beijing rail transport system (2022–2027) mentions a proposal about the branch line of Line 1. The branch line is a southwest-to-northeast line starts from Qinglonghudong (located at the east side of [[Wangzuo Town#Tourism|Qinglong Lake]], in [[Wangzuo Town]], [[Fengtai District]]) to [[Bajiao Amusement Park station|Bajiao Amusement Park]] in [[Shijingshan District]]. It will be {{convert|21|km|abbr=on}} in length with 9 new stations.<ref name=Janzdb /><ref>{{cite web|url=https://xinwen.bjd.com.cn/content/s676b7357e4b06b0a5624a9a5.html|title=地铁1号线支线9座车站进场施工！新招减少对周边居民影响|quote=地铁1号线支线西起青龙湖东站，北至八角游乐园站，全长约21公里，设10座车站|date=2024-12-25}}</ref><ref>{{Cite web |date=2022-07-08 |title=北京市轨道交通第三期建设规划（2022-2027年）环境影响报告书（征求意见稿）.pdf |url=https://www.rails.cn/download/2022/%E9%99%84%E4%BB%B61%EF%BC%9A%E5%8C%97%E4%BA%AC%E5%B8%82%E8%BD%A8%E9%81%93%E4%BA%A4%E9%80%9A%E7%AC%AC%E4%B8%89%E6%9C%9F%E5%BB%BA%E8%AE%BE%E8%A7%84%E5%88%92%EF%BC%882022-2027%E5%B9%B4%EF%BC%89%E7%8E%AF%E5%A2%83%E5%BD%B1%E5%93%8D%E6%8A%A5%E5%91%8A%E4%B9%A6%EF%BC%88%E5%BE%81%E6%B1%82%E6%84%8F%E8%A7%81%E7%A8%BF%EF%BC%89.pdf |website=China Academy of Railway Sciences Co., Ltd. |access-date=2022-07-08 |url-status=dead |archive-date=2022-07-08 |archive-url=https://web.archive.org/web/20220708041025/https://www.rails.cn/download/2022/%E9%99%84%E4%BB%B61%EF%BC%9A%E5%8C%97%E4%BA%AC%E5%B8%82%E8%BD%A8%E9%81%93%E4%BA%A4%E9%80%9A%E7%AC%AC%E4%B8%89%E6%9C%9F%E5%BB%BA%E8%AE%BE%E8%A7%84%E5%88%92%EF%BC%882022-2027%E5%B9%B4%EF%BC%89%E7%8E%AF%E5%A2%83%E5%BD%B1%E5%93%8D%E6%8A%A5%E5%91%8A%E4%B9%A6%EF%BC%88%E5%BE%81%E6%B1%82%E6%84%8F%E8%A7%81%E7%A8%BF%EF%BC%89.pdf }}</ref> Construction on the Line 1 branch began on January 18, 2024.<ref name=Janzdb>{{Cite web |date=2024-01-19 |title=北京地铁1号线支线今起开工，将新建9座车站！线路图来了|url=https://zdb.beijing.gov.cn/bjzdxmb/gdjt/202401/ae90aaacb41f43b1931e0743bc5191bb.shtml|quote=1月18日上午，记者从轨道交通1号线支线工程开工建设动员会上了解到，北京地铁1号线支线今起开工建设……记者了解到，1号线支线工程西起青龙湖东站，终点接轨至既有的八角游乐园站，全长约21公里，均为地下站}}</ref>

To facilitate construction of the extension, the project will need to renovate and expand {{stl|Beijing Subway|Bajiao Amusement Park}} Station.<ref>{{cite web|url=https://ggzyfw.beijing.gov.cn/jyxxggjtbyqs/20230526/4081774.html|title=北京轨道交通1号线支线工程勘察02合同段（勘察）招标公告|publisher=北京市公共资源交易服务平台|date=2023-05-26|quote=02 The contract section includes Xi'erqu Station (inclusive) - Zhangguozhuang Station (inclusive) - Garden Expo Park West Gate Station (inclusive) - Tiyuchang Nanjie Station (inclusive) - Bajiao Amusement Park Station (inclusive), 4 new stations 1 renovation station 4 sections...Bajiao Amusement Park Station reconstruction length 200m|accessdate=2024-05-19|archive-date=2023-05-28|archive-url=https://web.archive.org/web/20230528002319/https://ggzyfw.beijing.gov.cn/jyxxggjtbyqs/20230526/4081774.html|url-status=live}}</ref> According to the second announcement of the environmental impact assessment of the Line 1 branch line project released in October 2023, this station will be a new platform for the branch line of Line 1, and the new platform will be combined with the existing Line 1 platform to form a separate island platform, so that the station will become a double-island station.<ref>{{cite web|url=https://www.bii.com.cn/Portals/0/AttachUpload/pdf/2023100814064725.pdf|title=北京轨道交通1号线支线工程环境影响评价报告书（征求意见稿）|publisher=北京市基础设施投资有限公司|date=2023-10-08|accessdate=2024-05-19|archive-date=2023-10-08|archive-url=https://web.archive.org/web/20231008095521/http://www.bii.com.cn/Portals/0/AttachUpload/pdf/2023100814064725.pdf|url-status=live}}</ref> 

{| class="wikitable"
! colspan="2" | Station name<ref name=bjn202303>{{cite web|title=北京地铁1号线今年将建支线 |url=http://epaper.bjnews.com.cn/html/2023-03/03/content_829035.htm|date=2023-03-03}}</ref>
! rowspan="2" | Connections
! rowspan="2" |Location
|-
! {{small|English}}
! {{small|Chinese}}
|-style=background:#{{rcr|BJS|1}}; height: 2pt
|colspan=2|
| colspan = "2" |
|-bgcolor="lightgrey"
|{{stl|BJS|Bajiao Amusement Park}}
|{{large|{{lang|zh-cn|八角游乐园}}}}
|{{rint|Beijing|1}} (Main line)
| rowspan="2" |[[Shijingshan, Beijing|Shijingshan]]
|-bgcolor="lightgrey"
|{{stl|BJS|Tiyuchang Nanjie}}
|{{large|{{lang|zh-cn|体育场南街}}}}
|<!--{{rint|Beijing|11}}-->
|-bgcolor="lightgrey"
|{{stl|BJS|Garden Expo Park West Gate}}
|{{large|{{lang|zh-cn|园博园西门}}}}
|
| rowspan="8" |[[Fengtai, Beijing|Fengtai]]
|-bgcolor="lightgrey"
|{{stl|BJS|Zhangguozhuang}}
|{{large|{{lang|zh-cn|张郭庄}}}}
|{{rint|Beijing|14}}
|-bgcolor="lightgrey"
|{{stl|BJS|Xi'erqu}}
|{{large|{{lang|zh-cn|西二区}}}}
|
|-bgcolor="lightgrey"
|{{stl|BJS|Houlücun Railway Station}}
|{{large|{{lang|zh-cn|后吕村}}}}
|<!--{{rint|beijing|Sub-Central}}-->
|-bgcolor="lightgrey"
|{{stl|BJS|Yungang}}
|{{large|{{lang|zh-cn|云岗}}}}
|
|-bgcolor="lightgrey"
|{{stl|BJS|Wangzuo}}
|{{large|{{lang|zh-cn|王佐}}}}
|
|-bgcolor="lightgrey"
|{{stl|BJS|Minzu Univ.}}
|{{large|{{lang|zh-cn|民族大学}}}}
|
|-bgcolor="lightgrey"
|{{stl|BJS|Qinglonghudong}}
|{{large|{{lang|zh-cn|青龙湖东}}}}
|
|-style=background:#{{rcr|BJS|1}}; height: 2pt
|colspan=2|
| colspan = "2" |
|}

==Rolling Stock==
{{main|Beijing Subway rolling stock}}

===Current===
{| class="wikitable" style="border-collapse: collapse; text-align: center;"
!Model!!Image!!Manufacturer!!Year Built!!Year Refurbished!!Amount in Service!!Fleet Numbers!!Depot
|-
| {{ill|Beijing Subway DKZ4|zh|北京地铁DKZ4型电动车组|lt=DKZ4G}}
| [[File:S401 leaving Sihui (20210421101850).jpg|150px]]
| [[CRRC Changchun Railway Vehicles]]<br />[[Beijing Subway Rolling Stock Equipment]]
| {{nowrap|1998–2001}}
| 2007<br />2010-2012<br />2015-2016<br />2020-2021
| 31
| S401–S431<br />(01 001–01 031)
| {{ill|Sihui depot|lt=Sihui|zh|四惠车辆段}} (except two in {{ill|Gucheng depot|lt=Gucheng|zh|古城车辆段}})
|-
| {{ill|Beijing Subway SFM04|zh|北京地铁SFM04型电动车组|lt=SFM04/04A}}
| [[File:01 035 leaving Sihui (20210421103655).jpg|150px]]
| rowspan="2" | [[CRRC Qingdao Sifang]]<br />[[Beijing Subway Rolling Stock Equipment]]
| {{nowrap|2006–2011}}
| 2021
| 39
| G432–G470<br />(01 032–01 070)
| Gucheng
|-
| {{ill|Beijing Subway SFM01/02/07|zh|北京地铁SFM01/02/07型电动车组|lt=SFM01/02/07}}
| [[File:01_074_at_Chajiafen_(20210530183137).jpg|150px]]
| {{nowrap|2003–2005}}
| 2008<br />2015-2020<br />2021
| 108
| TQ401–TQ408, TQ415–TQ424<br />(01 071–01 078, 01 085–01 094)
| {{ill|Tuqiao depot|lt=Tuqiao|zh|土桥车辆段}}
|-
| {{ill|Beijing Subway BDK06|zh|北京地铁BDK06型电动车组|lt=BDK06}}
| [[File:01_101_at_Bangzijing_East_(20210601130328).jpg|150px]]
| [[Beijing Subway Rolling Stock Equipment]]
| {{nowrap|2018–2021}}
|
| 72
| TQ431–TQ437 (01 101–01 107), 01 108–01 112
| Tuqiao, Sihui
|}


===Former===
All were based at Gucheng depot.
{| class="wikitable" style="border-collapse: collapse; text-align: center;"
!Model!!Image!!Manufacturer!!Year Built!!Years in service!!Number Made!!Fleet Numbers (Before 1996)!!Fleet Numbers (After 1996)!!Notes
|-
| {{ill|Beijing Subway DK1|zh|北京地铁DK1型电动车组|lt=DK1}}
| [[File:BJ001 at Metro Trans 2018 (20180613160419).jpg|150px]]
| rowspan="6" |[[CRRC Changchun Railway Vehicles]]
| 1967
| {{n/a}}
| 2
| 001–002
| {{n/a}}
| Test train, not for revenue service.
|-
| {{ill|Beijing Subway DK2|zh|北京地铁DK2型电动车组|lt=DK2}}
| [[File:Beijing_2042_for_drill.JPG|150px]]
| {{nowrap|1969–1970}}
| 1969–1985
| 80
| 201–219
| {{n/a}}
| 76 cars were refurbished into DK11.
|-
| {{ill|Beijing Subway DK3|zh|北京地铁DK3型电动车组|lt=DK3/3G}}
| [[File:Beijing Subway DK3.jpg|150px]]
| 1971–1973
| 1971-2002
| 50
| {{unknown}}
| G101–G107
| Transferred to line 13 and Batong line.
|-
| {{ill|Beijing Subway DK8|zh|北京地铁DK8型电动车组|lt=DK8}}
|
| 1982
| {{unknown}}
| 52
| 401–413
| {{n/a}}
| Transferred to line 2.
|-
| {{ill|Beijing Subway DK11|zh|北京地铁DK11型电动车组|lt=DK11}}
| [[File:DK11_G213.jpg|150px]]
| 1984–1985
| 1984–2008
| 76
| 601–619
| G201–G207, G2082–G2085, G209–G213
|
|-
| {{ill|Beijing Subway DK20|zh|北京地铁DK20型电动车组|lt=DK20/20G}}
| [[File:G109_at_TAW.JPG|150px]]
| 1994–1995
| 1994–2012
| 42
| 443–449
| G108–G114
| Originally retired in 2008, reactivated due to DKZ4 trains being overhauled.
|-
| {{ill|Beijing Subway BD1|zh|北京地铁BD1型电动车组|lt=BD1}}
|
| rowspan="3" |[[Beijing Subway Rolling Stock Equipment]]
| 1990–1992
| 1990–1994
| 18
| 3083–3084, 309–311
| {{n/a}}
| Transferred to line 2.
|-
| {{ill|Beijing Subway BD2|zh|北京地铁BD2型电动车组|lt=BD2/2G}}
| [[File:G120_at_Gucheng.JPG|150px]]
| 1994–1998
| 1995–2012
| 72
| 450–454 (first batch only)
| G115–G126
| Originally retired in 2008, reactivated due to DKZ4 trains being overhauled.
|-
| {{ill|Beijing Subway BD3|zh|北京地铁BD3型电动车组|lt=BD3}}
|
| 1995
| 1996–2001
| 2
| {{n/a}}
| G2081, G2086
| Linked with DK3 cars G2082–G2085.
|}

==See also==
{{Portal|Trains}}
* [[Restricted stations of Line 1, Beijing Subway]]

==Notes==
{{notelist}}

==References==
{{Reflist}}

{{Commons category}}
{{Beijing transit}}
{{Beijing Subway Station|line1=1}}

[[Category:Beijing Subway lines]]
[[Category:Railway lines opened in 1971]]
[[Category:1971 establishments in China]]
[[Category:750 V DC railway electrification]]
[[Category:1971 in Beijing]]