Is it convenient for the train from Lhasa to Chengdu to transfer at Xining?

The train from Lhasa to Chengdu is inconvenient to transfer at Xining. The through train from Lhasa to Chengdu needs to change midway. The train time from Lhasa to Xining is relatively long, 24 to 30 hours. The train time from Xining to Chengdu is short, 10 to 15 hours. The whole journey takes a long time. Because Lhasa to Xining is an aerobic train at high altitude, it is particularly inconvenient to change trains in Xining for the sake of passengers' health, comfort and safety. Lhasa, the capital of Xizang Autonomous Region, China, is located on the plateau in the southwest of China. It is the central city of politics, economy, culture and transportation in Tibet and one of the largest cities in Tibet.