In March, 1975, the No.53k first ship completed the first phase of the project, with the ship number 53K; In the same year, the "Haihongqi" -61 began the ship-to-ship test-which means that the ship-to-air missile of the People's Navy was launched 27 years later than that of the United States.
Two years later, in 1977, the sister ship of 531 was delivered, but "Haihongqi"-61 was still struggling to give birth on the slipway, and the struggle lasted for ten years. It was not until 1986 that the flight test of the sea design was finalized and successfully finalized. Haihongqi-61 missile adopts semi-active homing guidance, solid rocket engine, continuous wave radar seeker, semi-active fuze and guidance fuze, miniaturized autopilot, hydraulic control, gas turbine generator, chain warhead (weighing 4 kg), monopulse tracking and continuous wave guidance radar, stable platform, rotary magazine, double-mounted follow-up launcher, missile automatic detection and other technologies, and its weight and size are close to those of the early western sea sparrow. The missile has a launching weight of 3 kilograms, a maximum speed of Mach 3, an effective range (horizontal direction) of 1 kilometers and a shooting height of 8 kilometers.