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Aerial photo taken on May 19, 2018 shows a scene of Diaolongzui Village at the foot of the Laoshan Mountain in Qingdao, east China's Shandong Province. (Xinhua/Guo Xulei)

Blooming flowers are seen in Qingdao, east China's Shandong Province, May 27, 2018. The coastal city will host the 18th summit of the Shanghai Cooperation Organization (SCO) in June. (Xinhua/Li Ziheng)