Visitors enjoy their leisure time at Dongli Lake scenic spot in Tianjin, north China's municipality, Sept. 1, 2020. In recent years, Tianjin has promoted the construction of a green ecological barrier area on the land between the Tianjin Binhai New Area and the central urban area. (Xinhua/Sun Fanyue)

People drive a motorboat on Dongli Lake in Tianjin, north China's municipality, Sept. 1, 2020. In recent years, Tianjin has promoted the construction of a green ecological barrier area on the land between the Tianjin Binhai New Area and the central urban area. (Xinhua/Sun Fanyue)

Aerial photo taken on Sept. 1, 2020 shows a view at Dongli Lake scenic spot in Tianjin, north China's municipality. In recent years, Tianjin has promoted the construction of a green ecological barrier area on the land between the Tianjin Binhai New Area and the central urban area. (Xinhua/Sun Fanyue)

Aerial photo taken on Sept. 2, 2020 shows a paddy field painting in Wangwen Village of Xiqing district in Tianjin, north China's municipality. In recent years, Tianjin has promoted the construction of a green ecological barrier area on the land between the Tianjin Binhai New Area and the central urban area. (Xinhua/Sun Fanyue)

Photo taken on Sept. 2, 2020 shows the view of Xinzhuang Bay in Jinnan district of Tianjin, north China's municipality. In recent years, Tianjin has promoted the construction of a green ecological barrier area on the land between the Tianjin Binhai New Area and the central urban area. (Xinhua/Sun Fanyue)

A worker does gardening work at a park in Tianjin, north China's municipality, Sept. 1, 2020. In recent years, Tianjin has promoted the construction of a green ecological barrier area on the land between the Tianjin Binhai New Area and the central urban area. (Xinhua/Sun Fanyue)