The air is very good, but there are more people on the festival. In fact, there are not many. It may exceed the usual reception volume. The most expensive one-way ticket for the elderly 1.2 children has to be fully ticketed. The key mountain is very cold. I waited for 2.5-3 hours for the mountain view. I feel that many people will catch a cold after going back! It can only be used as a support area. It takes about 200 to get in one person to come out.