Editing Anti-ballistic missile (section)

==== Historical Project 640 ====
Project 640 had been the PRC's indigenous effort to develop ABM capability.<ref name="sinodefence.com">{{cite web |url=http://www.sinodefence.com/special/airdefence/project640.asp |title=Project 640: China's National Missile Defence in the '70s |publisher=SinoDefence.com |access-date=11 May 2012 |url-status=dead |archive-url=https://web.archive.org/web/20111213232047/http://www.sinodefence.com/special/airdefence/project640.asp |archive-date=13 December 2011}}</ref> The Academy of Anti-Ballistic Missile & Anti-Satellite was established from 1969 for the purpose of developing Project 640.<ref name="sinodefence.com" /> The project was to involve at least three elements, including the necessary sensors and guidance/command system, the Fan Ji (FJ) missile interceptor, and the XianFeng missile-intercepting cannon.<ref name="sinodefence.com" /> The FJ-1 had completed two successful flight tests during 1979, while the low-altitude interceptor FJ-2 completed some successful flight tests using scaled prototypes.<ref name="sinodefence.com" /> A high altitude FJ-3 interceptor was also proposed. Despite the development of missiles, the programme was slowed down due to financial and political reasons. It was finally closed down during 1980 under a new leadership of Deng Xiaoping as it was seemingly deemed unnecessary after the 1972 Anti-Ballistic Missile Treaty between the Soviet Union and the United States and the closure of the US [[Safeguard Program|Safeguard]] ABM system.<ref name="sinodefence.com" />