![Children play on a square in Qingdao, east China\'s Shandong Province, June 3, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Zhang Cheng)](http://www.ecns.cn/hd/2018/06/07/f64c791376b74c78b8edac141654dd1a.jpg)
Children play on a square in Qingdao, east China's Shandong Province, June 3, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Zhang Cheng)
![Students of a middle school play football in Qingdao, east China\'s Shandong Province, June 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Li Ziheng)](http://www.ecns.cn/hd/2018/06/07/6401b5f24c12444fbcc9441152239c4c.jpg)
Students of a middle school play football in Qingdao, east China's Shandong Province, June 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Li Ziheng)
![A man goes windsurfering in Qingdao, east China\'s Shandong Province, May 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Zhang Cheng)](http://www.ecns.cn/hd/2018/06/07/76f1f80a3a6140619a09bff41800b7f9.jpg)
A man goes windsurfering in Qingdao, east China's Shandong Province, May 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Zhang Cheng)
![Citizens pose for photo at the Olympic Park in Qingdao, east China\'s Shandong Province, June 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Li Ziheng)](http://www.ecns.cn/hd/2018/06/07/ae2108c36d6a4105ae51d46a7fd68122.jpg)
Citizens pose for photo at the Olympic Park in Qingdao, east China's Shandong Province, June 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Li Ziheng)
![Children practice roller skating in Qingdao, east China\'s Shandong Province, June 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Li Ziheng)](http://www.ecns.cn/hd/2018/06/07/1f02920a116d46768527d18398245ede.jpg)
Children practice roller skating in Qingdao, east China's Shandong Province, June 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Li Ziheng)
![A man does exercises at a park in Qingdao, east China\'s Shandong Province, June 3, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Jiang Kehong)](http://www.ecns.cn/hd/2018/06/07/c4db2d9327e74c30b7d4668cac6d02a7.jpg)
A man does exercises at a park in Qingdao, east China's Shandong Province, June 3, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Jiang Kehong)
![A sailboat is seen in the water in Qingdao, east China\'s Shandong Province, June 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Yin Gang)](http://www.ecns.cn/hd/2018/06/07/ea230008bb4145b1a163f6fbda22295f.jpg)
A sailboat is seen in the water in Qingdao, east China's Shandong Province, June 4, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9 to 10 in Qingdao. (Xinhua/Yin Gang)