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. (Xinhua/Zhang Cheng)

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. (Xinhua/Li Ziheng)