Citizens spend time in an air-raid shelter in Hangzhou, east China’s Zhejiang Province, July 17, 2018. The local government opens four air-raid shelters from July 1 to August 31 for citizens to shield from the summer heat. (Photo: Xinhua)

Citizens spend time in an air-raid shelter in Hangzhou, east China’s Zhejiang Province, July 17, 2018. The local government opens four air-raid shelters from July 1 to August 31 for citizens to shield from the summer heat. (Photo: Xinhua)

Photo taken on July 17, 2018 shows an air-raid shelter which is open to the public in Hangzhou, east China’s Zhejiang Province. The local government opens four air-raid shelters from July 1 to August 31 for citizens to shield from the summer heat. (Photo: Xinhua)