Tourists take photos at the May Fourth Square in Qingdao, east China's Shandong Province, May 31, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9-10 in Qingdao. (Xinhua/Guo Xulei)
Photo taken on May 31, 2018 shows the scenery in Qingdao, east China's Shandong Province. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9-10 in Qingdao. (Xinhua/Guo Xulei)
Photo taken on May 31, 2018 shows the scenery in Qingdao, east China's Shandong Province. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9-10 in Qingdao. (Xinhua/Guo Xulei)
Tourists take photos at the May Fourth Square in Qingdao, east China's Shandong Province, May 31, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9-10 in Qingdao. (Xinhua/Zhu Zheng)
A gardener waters the flowers at the May Fourth Square in Qingdao, east China's Shandong Province, May 31, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9-10 in Qingdao. (Xinhua/Zhu Zheng)
Photo taken on May 31, 2018 shows the scenery in Qingdao, east China's Shandong Province. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9-10 in Qingdao. (Xinhua/Yin Gang)