Xu Liping's hand-carved powder surface error is less than 0.2 mm, and the hair is about 70 to 90 microns.

Xu Liping, head of solid fuel powder molding group of aerospace engine in 74 16 Factory of the Fourth Research Institute of China Aerospace Science and Technology Corporation, is a national senior technician, a special aerospace technician, and a great craftsman of carving gunpowder.