The western slope of Changbai Mountain needs climbing to see Tianchi Lake. There are 1442 steps at a distance of 900 meters, and half an hour's slow climbing is enough. Wild flowers bloom in twos and threes on the hillsides on both sides of the steps. The air is fresh and comfortable, and the sky is blue. Looking back, you can see the endless mountains in the sky. In summer, the Northeast ultraviolet rays are strong, so you should pay special attention to sunscreen. The angle of the Tianchi Lake on the west slope is wider, and the Tianchi lake looks particularly beautiful and shocking from here. A boundary pillar can also be seen at an altitude of 2200 meters. The boundary pillar is located between the border between China and North Korea. When tourists come here, they will basically stop and take photos, or experience the feeling of stepping on the border between the two countries. Looking at the national emblem and the Chinese characters on the boundary pillar, the whole person immediately stands in awe.