A silver pheasant is seen in the Wuyishan National Park, southeast China's Fujian Province, Dec. 1, 2018. A research expedition about the biodiversity on the Mount Wuyi launched on Saturday. A group of experts of ecology, geography, wildlife protection and researchers from Wuyishan National Park took part in the expedition. Mount Wuyi, boasting one of best preserved primeval forests, is a representative example of biodiversity conservation. (Xinhua/Jiang Kehong)