Editing Line 1 (Beijing Subway) (section)

===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>