Tourists visit the Mingsha Mountain and Crescent Spring scenic area in Dunhuang, Northwest China’s Gansu province, May 2, 2019. [Photo/Xinhua]

A tourist ziplines at a scenic spot in Zigui county, Yichang, Central China’s Hubei province, May 2, 2019.[Photo/Xinhua]

Tourists watch a dolphin show at Xin’ao Aquarium in Qinhuangdao, North China’s Hebei province, May 2, 2019.[Photo/Xinhua]

Tourists have fun at Xin’ao Aquarium in Qinhuangdao, North China’s Hebei province, May 2, 2019.[Photo/Xinhua]

Tourists view scenery on bamboo rafts on Jiuqu River of Wuyi Mountain in East China’s Fujian province, May 2, 2019. [Photo/Xinhua]

Tourists visit the Nanshan Cultural Tourism Zone in Sanya, South China’s Hainan province, May 2, 2019. [Photo/Xinhua]

Tourists visit the Yuhuagu scenic area in Qianxi county in Tangshan, North China’s Hebei province, May 2, 2019. [Photo/Xinhua]

Aerial photo taken on May 2, 2019 shows tourists visiting the Zhuoshui ancient town in Qianjiang district, Southwest China’s Chongqing.[Photo/Xinhua]