Chengmai R & F Mangrove Wetland Park is in Chengmai County, north Hainan, adjacent to Haikou, the capital of Hainan Province, so it is also known as the "backyard" of Haikou. There is a very long plank road across the entire mangrove water area. Strolling down the road, you can view the entire forest on the water. In addition to the mangrove wetland, there are flocks of flamingoes that look like red elves. They are elegant, free and interesting.