Aerial photo taken on Oct. 26, 2018 shows a mangrove conservation area in the Beihai Golden Bay in Beihai City, south China's Guangxi Zhuang Autonomous Region. Mangrove trees are densely scattered along the shoreline of Beihai covering about 3,400 hectares. They can help hold back tidal waves and provide plenty of food and homes for birds and marine creatures. (Xinhua/Wei Hai)