Ganzi Tibetan Autonomous Prefecture, (甘孜藏族自治州) known as Garzê in Tibetan, is in Sichuan Province, China.
A great many Tibetan dialects are used in this region, and they differ enough from each other and from Lhasa Tibetan as to be mutually unintelligible. There are also some local languages such as Minyak that are considered separate languages and are only distantly, if at all, related to Tibetan. Many ethnic Tibetans speak Mandarin Chinese and/or the Sichuan dialect of Chinese. Younger people may also speak English.
See the beautiful stupas at the Kandze Gompa on the outskirts of town.
Try the nice little Chinese restaurants along the river on the opposite side to the supermarket.