Must order this one! Great value experience, the explanation is very detailed ~ than the explanation of the Potala Palace is too detailed, every corner is explained in detail, the route is good ~ and there is the booking problem mentioned by many people. We were 3 people before, so we ordered three copies. Later, the travel agency called and said that one copy was enough. How many tickets are needed to tell them directly, and you can pay at the scene. This detail has also been reported to Trip.com. I hope I can mark it next time, but it is really great to explain this!