Photo taken on April 19, 2018 shows the Passive House Technology Center at the Sino-German Ecopark in Qingdao, a coastal city in east China's Shandong Province. Home to Tsingtao Beer and home appliance giant Haier, Qingdao is becoming a more attractive place to run important multilateral events. In June, the coastal city will host the 18th summit of the Shanghai Cooperation Organization (SCO). [Photo/Xinhua] 

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