(Jiayin June 14), August 1, 1974, the official navy nuclear-powered submarines.

1974, the Central Military Commission issued an order own design and manufacture a nuclear-powered submarine named the "Long March 1, incorporated into the Navy order of battle. On the same day, the Central Military Commission held a solemn military flag ceremony. Submarine Navy Commander Xiao Jinguang, National Defense Science and Technology Commission, deputy director of Qian Xuesen, took part in the handover of the submarine named Assembly. Since then, (history TodayOnHistory.com) People's Navy has entered a new stage of a nuclear submarine. The submarine completed by December 26, 1970, the water.