I only bought tickets at the entrance of Yunlongjian. It's really convenient. The price is cheaper than the public comment. The time for ticket issuance is fast. There are quite a lot of people playing. Even the hearts and minds of people in Yungang are good. The child suddenly suffered from hypoglycemia. Unfortunately, no sugar was bought. The owner of the stall offered us ice sugar to eat. Thank you so much. A pleasant trip!