Meng An, the electrical supervisor of Henan Kaifeng Weishi Textile Co., Ltd., entered the factory at the age of 20. After 29 years in production, he has mastered the unique skill of maintaining imported frequency converters, collected technical data of hundreds of frequency converters, and mastered the performance and application of various frequency converters. In particular, he has his own unique solutions to imported Japanese and German frequency converters, Self made original components can replace imported ones, and all equipment failures can be solved accurately, accurately and quickly. He is recognized as a "competent person" by employees of the enterprise. He said, "We should be stubborn in dealing with problems to achieve a stubborn state, so that we can do things well and perfect."