Children have fun at the Laoshe Park in Qingdao, East China's Shandong province, May 23, 2018. The coastal city will host the 18th summit of the Shanghai Cooperation Organization (SCO) in June. [Photo/Xinhua]

People taste snacks in Qingdao, East China's Shandong province, Feb 17, 2018. The coastal city will host the 18th summit of the Shanghai Cooperation Organization (SCO) in June. [Photo/Xinhua]

Aerial photo taken on May 4, 2018 shows a night view of the Fushan Bay in Qingdao, East China's Shandong province. The coastal city will host the 18th summit of the Shanghai Cooperation Organization (SCO) in June. [Photo/Xinhua]