Photo taken on Sept. 13, 2018 shows a metro station near the Meijiang Convention and Exhibition Center in Tianjin, north China. The 12th Summer Davos Forum will open on Sept. 18 in Tianjin. (Xinhua/Li Ran)

Aerial photo taken on Sept. 13, 2018 shows the scenery near the Meijiang Convention and Exhibition Center in Tianjin, north China. The 12th Summer Davos Forum will open on Sept. 18 in Tianjin. (Xinhua/Li Ran)

Aerial photo taken on Sept. 13, 2018 shows a view of the Meijiang Convention and Exhibition Center in Tianjin, north China. The 12th Summer Davos Forum will open on Sept. 18 in Tianjin. (Xinhua/Li Ran)

Aerial photo taken on Sept. 13, 2018 shows the scenery near the Meijiang Convention and Exhibition Center in Tianjin, north China. The 12th Summer Davos Forum will open on Sept. 18 in Tianjin. (Xinhua/Li Ran)

Photo taken on Sept. 16, 2018 shows a view of the Meijiang Convention and Exhibition Center in Tianjin, north China. The 12th Summer Davos Forum will open on Sept. 18 in Tianjin. (Xinhua/Li Ran)