Ren Xinmin was a Chinese aerospace engineer and a specialist in astronautics and liquid rocket engine technology. He was the technical director of the Long March 1 rocket, which launched the Dong Fang Hong I, China's first satellite, and the chief designer of Chinese storable propellant rocket engine. He was also the chief designer for the Long March 3 launch vehicle, Fengyun, and SJ (Shijian) series satellites.