Almost 400 devices form Chinese characters and different patterns in sky over Nanjing, East China's Jiangsu province in dazzling choreographed display on March 13, 2018. (Photo/SipaPhoto)
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Almost 400 devices form Chinese characters and different patterns in sky over Nanjing, East China's Jiangsu province in dazzling choreographed display on March 13, 2018. (Photo/SipaPhoto)