Every time I put down the knife, I can hear my own heartbeat. There can't be a moment on the powder. This is really a close call. Strategic missiles, manned space flight, and every weapon of a big country cannot be separated from you. Just like the knife in your hand, it has been forged for 26 years. You are a craftsman, you are a great craftsman.

Moral behavior

Xu Liping, senior technician of 74 16 Factory of the Fourth Research Institute of China Aerospace Science and Technology Corporation. Since 1987 entered the factory, it has been micro-shaping the missile solid fuel engine propellant. If you use a knife on gunpowder, you may generate sparks if you are not careful, which may lead to combustion and explosion. At present, powder forming is a difficult problem all over the world and cannot be completely replaced by machines. The strength of cutting depends entirely on the judgment of the workers themselves. Whether the powder surface accuracy is qualified or not directly determines the accurate range of the missile. 0.5 mm is the maximum permissible error of solid motor powder surface accuracy, while Xu Liping's hand-carved powder surface error is less than 0.2 mm, which is perfect. In order to eliminate potential safety hazards, Xu Liping also designed and invented more than 20 kinds of powder shaping tools, two of which were patented by the state, and one was named "flat knife" by the company. Due to years of carving gunpowder in one posture and the sequelae of gunpowder poisoning, Xu Liping's body became tilted to one side and his hair lost more than half. For 28 years, he carved gunpowder at great risk and was known as "a great country craftsman".