A railway maintenance worker conducts a safety inspection on a heavy-haul coal train at the Taiyuan North rolling stock depot of China Railway Taiyuan Group in Shanxi province. The inspection comes as China's key coal transport arteries, including the Datong-Qinhuangdao Railway and Watang-Rizhao Railway, enter their annual spring maintenance period, making uninterrupted safe operations critical to safeguarding national energy supply amid global geopolitical tensions and rising energy prices.