What to wear to Lanzhou on May Day, and what's the weather like recently?

There is a great temperature difference between morning and evening in Lanzhou. You can wear short sleeves and bring a coat when you come. The cotton-padded jacket upstairs is too outrageous. The climate in Lanzhou is very good and the temperature is moderate. By the way, I'll give you two calls, which will definitely help you. Lanzhou Hotel Reservation: 093 1-8860 123, Lanzhou Tourism Consultation: 093 1-875 1766.