The railway workers tightened the bolts. Zhang Zhonghai took the screen cleaning machine to clean the track bed pollution in the line. Zhang Zhonghai took the tamping machine to tamp the track after cleaning. Zhang Zhonghai took photos of railway staff opening the track bed before screening. Zhang Zhonghai took a photo of the cleaning machine car throwing the dirt in the track bed out of the line. Zhang Zhonghai took a picture of lifting the old pillow out of the net after replacing it. Zhang Zhonghai photographed the railway staff to carry out data detection on the line after cleaning and tamping. Zhang Zhonghai took photos of the railway Spring Festival transportation coming to an end. On February 21, China Railway Zhengzhou Bureau Group Co., Ltd. carried out centralized maintenance and construction of Jiaozhou-Liuzhou Railway Line in southwest Henan. On the same day, the Nanyang Public Works Section of the Bureau organized 252 construction workers to quickly arrive at the designated place at night with two groups of large mechanical screen cleaning vehicles and sleeper unloading and replacement locomotives, and carried out track bed cleaning, sleeper replacement, line repair and other maintenance operations on the two sections of the line between Goulin Station and Gengpo Station of Jiaozhou-Liuzhou Railway at the junction of Henan and Hubei, in order to improve the stability of the trunk railway of the passenger logistics transportation channel. (Outlook New Era)