World's highest aquarium starts trial operation in Qinghai

A keeper interacts with a dolphin at an aquarium in Xining, northwest China's Qinghai Province, July 18, 2019. The world's highest aquarium opened for trial operation in northwest China's Qinghai Province Thursday. At an altitude of more than 2,200 meters above sea level, the new aquarium is located in the city of Xining, the capital of Qinghai, representing the first aquarium on the Qinghai-Tibet Plateau. (Photo by Wang Bo/Xinhua)