Depart from Chengdu, via National Highway 3 18, and arrive in Lhasa. This route is from Sichuan to Tibet, so it is called "crossing the gold". "Westward" means from Lhasa to Xining, and take the 109 Qinghai-Tibet line. If the landlord wants to go to Lhasa, it is suggested to consult "Eat, Drink and Have Fun in Western Sichuan" or "Three-legged Outdoor" for more practical strategies.