Photo taken on June 2, 2018 shows the night view near Wusi Square in Qingdao, East China's Shandong province. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. [Photo/Xinhua]

Panorama photo taken on June 2, 2018 shows the night view of Wusi Square in Qingdao, East China's Shandong province. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. [Photo/Xinhua]

Photo taken on June 4, 2018 shows the night view near Olympic Sailing Center in Qingdao, East China's Shandong province. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. [Photo/Xinhua]