Liu Wensheng, a mechanic from Xuzhou Construction Machinery Group, debugs an excavator on May 27, 2017. Specializing in earth-moving machinery, Liu is recognized as a national senior technician in Jiangsu province, and won the championship for operating excavators and cranes during a national engineering machinery competition in 2010. Liu believes that craftsmanship demands proficient technique and professional quality.[Photo provided to chinadaily.com.cn]