Repairmen riding on horseback inspect power transmission lines. ZHANG LANG/CHINA NEWS SERVICE Electric power is rich in Liangshan Yi autonomous prefecture of Sichuan province and transmission lines are scattered across the entire prefecture. The State Grid Sichuan Maintenance Company guarantees electricity supply for the central and eastern regions. Jiang Jie is a company staffer in charge of the maintenance of power lines and towers. His colleagues are responsible for inspecting and testing the operations of local high-voltage and long-distance transmission lines.