I want to go to Gannan Tibetan Autonomous Prefecture in May this year. I don't know what to prepare.

Rhodiola granules (to prevent altitude sickness), if you want to go to a higher place, such as Queer Mountain, it is recommended to bring an oxygen bag. Generally, there used to be altitude sickness. Secondly, I am a soldier in Gannan area, where the temperature difference between day and night is relatively large and the clothes are relatively thick, but you should bring short sleeves and the like. It's still hot during the day, and ultraviolet rays at high altitude are toxic. Sun protection is necessary. Otherwise Ganzi is a good place.