The main peak of Wuzhishan Tropical Rainforest Area has an elevation of more than 1800. It takes three hours to walk along the trestle road to find the source of Changhua River. Unfortunately, one of our companions fell into the pond on the way and was crushed by big rocks. In order to avoid infection, all of us had to regret turning back. After all, it is a primitive forest. Safety is the most important. Listen to the local people tell us, when going to the mountains and countryside, there are many educated young people who have been lost here, and they can never be found again. On the way back to Sanya, I heard that Sanya to Wuzhishan will build a high-speed railway for tourism, which is about 80 kilometers long. After the completion of the high-speed railway, it will take only 30 minutes for Sanya to Wuzhishan. So, to go to Yalong Bay and go to the top of Wuzhishan, the highest point in Hainan, this is a journey to go up and down the sea, which is indispensable! If I have the chance to take the high-speed rail to Wuzhishan, I will do it again!