Photo taken on July 10, 2017 shows Tibetan antelopes in Nagqu, southwest China's Tibet Autonomous Region, July 10, 2017. China began its second scientific expedition to the Qinghai-Tibet Plateau this June to study changes in climate, biodiversity and environment over the past decades. The last expedition of similar scale was conducted in the 1970s. (Xinhua/Liu Dongjun)
