A staff member of Datong West Power Supply Section in Shanxi province operates a drone to check the overhead contact line on the Jining-Datong-Yuanping High-speed Railway, which links Shanxi and the Inner Mongolia autonomous region. This is part of the section's efforts to ensure the power supply safety of high-speed trains. Chinese railway operator China Railway has promised to improve scientific and technological empowerment to strengthen the backbone role of railways in the nation's transport system.