On 22nd, CASA delivered the microgravity metal additive manufacturing recoverable scientific experiment load to the Institute of Mechanics of the Chinese Academy of Sciences. Previously, this payload independently developed by the institute was carried on the Zhongke Aerospace Lihong-1 remote control vehicle and successfully conducted China's first space metal additive manufacturing (i.e. "3D printing") experiment on January 12th. It is reported that this is the first time in China that a space metal additive manufacturing return type scientific experiment has been implemented based on a rocket platform. The experimental team successfully prepared metal components using 3D printing technology in the microgravity environment of space, and the overall technology reached world-class level. During the task, researchers have broken through a series of key technologies in metal additive manufacturing under microgravity conditions, including stable material transportation and forming, closed-loop control of the entire process, and high reliability collaboration between load and rocket. After the experiment, the payload module landed smoothly and recovered through the parachute landing system. Researchers have successfully obtained process data for metal additive manufacturing in microgravity environments in space, including dynamic characteristics of the melt pool, material transport, solidification behavior, etc; At the same time, valuable experimental data was accumulated for the rapid iteration of space metal additive manufacturing technology in China, including the forming accuracy and mechanical properties of metal parts in space additive manufacturing. The success of this experiment marks the official transition of China's space metal additive manufacturing from the "ground research" stage to a new stage of "space engineering verification", which will effectively promote the development of China's space manufacturing technology and provide key support for future space infrastructure construction. (New Society)