The valley bottom forest is a primitive forest with fresh air. Next to the trestle road is the water flow from the source of Songhua River. In the middle, it passes through the narrowest part of Songhua River. This scenic spot is a step by step. It takes about 60-70 minutes to walk back and forth normally (including interval rest). Most of them are not very tired. They are flat roads. They are difficult to walk for a long time. They are also steps. However, when I walk, I just feel tired and flat. (Less than a tenth of the steps on the West slope) It's only 13:50 by car from the valley floor forest to the gate.