Liu Xiaoming, a master craftsman and senior technician of Anhui Huasu Co., Ltd., is not only proficient in the maintenance technology of more than 170 kinds of valves in China, the United States, Germany and Japan, but also breaks the foreign technical barriers and completely gets rid of the dependence on maintenance technology. Known as the "king of valves" in the industry, he overhauled valves with diameters ranging from 15mm to 1000mm and the maximum weight of two tons. He summarized and refined more than 60 cases of unique skills and troubleshooting, compiled a Collection of Master Craftsman's Fault Handling Cases and Unique Skills, and provided workers with a valuable practical textbook@ Anhui Federation of Trade Unions