Guo Lei, a craftsman in Chengde, a CNC lathe worker of Hebei Chengde Huafu Glass Technology Engineering Co., Ltd., and an enterprise training lecturer. Over the years, Guo Lei has summarized his experience and skills into a complete set of training courses and trained a number of excellent CNC lathe operators. Numerical control processing is one of the core technologies of modern manufacturing industry. Now Guo Lei is moving towards a higher goal@ Chengde Federation of Trade Unions