Dongfeng (missile)

After the signing of Sino-Soviet Treaty of Friendship, Alliance, and Mutual Assistance in 1950, the Soviet Union assisted China's military R&D with training, technical documentation, manufacturing equipment, and license-production of Soviet weapons. In the area of ballistic missiles, the Soviets transferred R-1 (SS-1), R-2 (SS-2), and R-11F to China. The first Chinese ballistic missiles were based on Russian design, which was originally based on the German V-2 rocket. Since then, China has made many advances in its ballistic missile and rocket technology. The space-launch Long March rocket, has its roots in the Dong Feng missile.The Dongfeng missile is a series of intermediate and intercontinental ballistic missiles operated by the People's Republic of China. Typically, the word Dongfeng is shortened to "DF", so Dongfeng 9 is written as DF-9.