In June, Qingdao, the coastal city in east China's Shandong Province, will host the 18th summit of the Shanghai Cooperation Organization (SCO), the world's most populous regional organization. Photos taken on May 30, 2018 show the city has turned into a city of flowers.(Photos: VCG)

In June, Qingdao, the coastal city in east China's Shandong Province, will host the 18th summit of the Shanghai Cooperation Organization (SCO), the world's most populous regional organization. Photos taken on May 30, 2018 show the city has turned into a city of flowers.(Photos: VCG)

In June, Qingdao, the coastal city in east China's Shandong Province, will host the 18th summit of the Shanghai Cooperation Organization (SCO), the world's most populous regional organization. Photos taken on May 30, 2018 show the city has turned into a city of flowers.(Photos: VCG)

In June, Qingdao, the coastal city in east China's Shandong Province, will host the 18th summit of the Shanghai Cooperation Organization (SCO), the world's most populous regional organization. Photos taken on May 30, 2018 show the city has turned into a city of flowers.(Photos: VCG)