Xiao Yuefei is the leader of the pipeline team in the chassis workshop of Guangxi Shenlong Automobile Manufacturing Co., Ltd. Xiao Yuefei, who has 12 years of experience in bus manufacturing, has developed the skill of "listening to sound and recognizing gas". By listening to the sound of air flow, you can identify the direction of air flow, the size of air pressure, and the action state of gas inside the valve body, and determine whether the brake pipeline of the vehicle is correctly connected according to the design requirements of the drawing, providing a solid guarantee for high-quality offline vehicles and safe operation of vehicles. @ Nanning Federation of Trade Unions