Migratory adult naked carps swim during the spawning season in the Quanji River, an inflow river of Qinghai Lake, northwest China's Qinghai Province, June 27, 2018. (Xinhua/Hou Deqiang)

Migratory adult naked carps swim during the spawning season in the Quanji River, an inflow river of Qinghai Lake, northwest China's Qinghai Province, June 27, 2018. (Xinhua/Hou Deqiang)