Daily work of staff members from Guiyang high-speed railway maintenance division in Guizhou

Staff members from Guiyang high-speed railway maintenance division check equipment before starting work in southwest China's Guizhou Province, Feb. 21, 2019. The division's main task is to check and repair the facilities on the railway for high-speed trains threading through Guizhou Province where karst landform poses a threat to the security to the passing trains. (Xinhua/Liu Xu)