Editing Sino-Soviet split (section)

=== Occasional cooperation ===
{{see also|International participation in the Vietnam War#Soviet Union|China in the Vietnam War}}
[[File:Ceausescu.jpg|thumb|[[Deng Xiaoping]], [[Nicolae Ceaușescu]] and [[Leonid Brezhnev]] attending the 9th Congress of the [[Romanian Communist Party]] in [[Bucharest]] in July 1965.]]
At times, the "competition" led to the USSR and PRC supporting the same factions in concert, such as when both countries supported [[North Vietnam]] during the [[Vietnam War]]. Both Soviet and Chinese support was vital for the supply of [[NLF and PAVN logistics and equipment|logistics and equipment to the NLF and PAVN]]. Most of the supplies were Soviet, sent through China overland.<ref>{{Cite web|title=The Vietnam War - CCEA - GCSE History Revision - CCEA|url=https://www.bbc.co.uk/bitesize/guides/z8kw3k7/revision/8|access-date=27 July 2021|website=BBC Bitesize|language=en-GB|archive-date=27 July 2021|archive-url=https://web.archive.org/web/20210727024025/https://www.bbc.co.uk/bitesize/guides/z8kw3k7/revision/8|url-status=live}}</ref> Some analyses find that Chinese economic aid was larger than that of the Soviets as early as 1965–1968.<ref>{{Cite journal|last=MEHTA|first=HARISH C.|date=2012|title=Soviet Biscuit Factories and Chinese Financial Grants: North Vietnam's Economic Diplomacy in 1967 and 1968|url=https://www.jstor.org/stable/44376154|journal=Diplomatic History|volume=36|issue=2|pages=301–335|doi=10.1111/j.1467-7709.2011.01024.x|jstor=44376154|issn=0145-2096|access-date=27 July 2021|archive-date=27 July 2021|archive-url=https://web.archive.org/web/20210727024025/https://www.jstor.org/stable/44376154|url-status=live|url-access=subscription}}</ref> One estimate finds that 1971–1973, the PRC sent the largest amount of aid constituting 90 billion [[Renminbi|yuan]].<ref name=":1">{{Cite book|last=Roberts|first=Priscilla Mary|url=https://books.google.com/books?id=anotqEyBmqQC&pg=PA303|title=Behind the Bamboo Curtain: China, Vietnam, and the World Beyond Asia|date=2006|publisher=Stanford University Press|isbn=978-0-8047-5502-3|pages=303–311|language=en|access-date=11 August 2021|archive-date=26 January 2022|archive-url=https://web.archive.org/web/20220126034046/https://books.google.com/books?id=anotqEyBmqQC&pg=PA303|url-status=live}}</ref> Soviet supplies flowed freely through China from before 1965 until 1969, when they were cut off. In 1971 however, China encouraged Vietnam to seek more supplies from the Soviet Union. 

From 1972, Chinese premier [[Zhou Enlai]] encouraged expeditions of Soviet rail trips, missile shipments, allowed 400 Soviet experts to pass to Vietnam, and on 18 June 1971, reopened Soviet freight in Chinese ports. China then agreed to all Vietnamese requests of allowing Soviet warehouses to store materiel for shipment to Vietnam. The result was a solid, and relatively continuous Communist Bloc support for North Vietnam during the Sino-Soviet split.<ref name=":1" /> However, some of the surmounting Soviet and Chinese tensions would grow into the [[Sino-Vietnamese War]] in 1979.<ref name=":1" />