Leng Yan, the "Nanning Craftsman" in 2022, is the chief engineer of the mechanized intelligent manufacturing R&D center of the Fifth Company of China Railway Shanghai Bureau. Since joining the work, he has successively participated in the construction of Nanning Liangqing Bridge, Nanning Shajing Flyover, Nanning Yudong Flyover, Nanning Jianxin Road Flyover, Nanning Metro Lines 3, 4 and 5, Guiyang Nanning High speed Railway Lot 10 and other projects. Leng Yan is hard-working, fearless of difficulties and obstacles, and has been working at the grassroots level in Nanning, completing the magnificent transformation from a technician to the "leader" of the team. "It's my understanding of craftsmanship spirit to persist and keep unremitting concentration to study," Leng Yan said@ Nanning Federation of Trade Unions