Tian Jinsheng, a mechanical engineer of the Changchun section of China Railway Shenyang Group Co., Ltd., prepares to work in Changchun, northeast China's Jilin Province, Jan. 9, 2020. Every night from 19:00 to 5:00 of the next morning, mechanical workers of the Changchun section of China Railway Shenyang Group Co., Ltd. conduct maintenance to guarantee the safe travel of electric multiple unit (EMU) trains. Although the job requires them to stay up all night and check hundreds of facilities, they always keep concentrated and attentive. "This Friday marks the beginning of the Spring Festival travel rush. We will keep much more focused on our work so that every passenger could travel safely," Zhang Yue said. (Xinhua/Zhang Nan)