Photo taken on Aug. 15, 2018 shows Tongji weir at the Ancient Weir-Home of Painting scenic area in the Liandu District of Lishui City, east China's Zhejiang Province. (Xinhua/Jin Liwang)

Tourists overlook Tongji weir at the Ancient Weir-Home of Painting scenic area in the Liandu District of Lishui City, east China's Zhejiang Province, Aug. 15, 2018. (Xinhua/Jin Liwang)

Aerial photo taken on Aug. 15, 2018 shows Tongji weir at the Ancient Weir-Home of Painting scenic area in the Liandu District of Lishui City, east China's Zhejiang Province. (Xinhua/Jin Liwang)

Tourists take pictures of fishermen catching fish at the Ancient Weir-Home of Painting scenic area in the Liandu District of Lishui City, east China's Zhejiang Province, Aug. 15, 2018. (Xinhua/Jin Liwang)