The Tianchi Lake in Changbai Mountain is a lake formed by a volcanic crater, part of which is located outside Korea. Baitou Mountain is the birthplace of the Korean nation. When you go there, you must know the time well. The ice in Tianchi will melt in August and September every year. The other time is the freezing period. We traveled to Tianchi. No one in the scenic area gave us instructions on how to play. We could only walk blindly by ourselves. The tour guide will introduce some self-paid scenic spots, and advise you not to go to any of them. You will regret it when you go, because those scenic spots are everywhere and the same. The tour guide will punish those who do not attend the self-paid attractions by waiting outside until midnight. There is a self-funded project is to soak in hot springs to eat barbecue, 188 yuan for self-funded, in fact, nothing to eat, Because barbecue is cold can not eat at all, which we have complained about. Some of the scenic spots behind the ticket do not know how to get there, because the car that delivers visitors will not pull you there at all. Only after returning can you find that you only see one third of the scenic spots.