With the arrival of late autumn, the vast expanse of poplar trees in Jiawa Town, Litang County, Ganzi Tibetan Autonomous Prefecture, Sichuan Province, which is located in Tibetan areas on the Western Sichuan Plateau, has turned yellow from green; the leisurely grazing yaks, the old herdsman and the quiet Tibetan villages form a harmonious and beautiful"fairy world" in the countryside.