Tourists watch water gushing out from the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province on June 25, 2020. The reservoir started to discharge water at a rate of 4,200 cubic meters per second Thursday. (Photo by Miao Qiunao/Xinhua)

Tourists watch water gushing out from the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province on June 25, 2020. The reservoir started to discharge water at a rate of 4,200 cubic meters per second Thursday. (Photo by Miao Qiunao/Xinhua)

Photo taken on June 25, 2020 shows water gushing out from the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province. The reservoir started to discharge water at a rate of 4,200 cubic meters per second Thursday. (Photo by Miao Qiunao/Xinhua)