People wearing Traditional Chinese Costumes Hanfu perform at Nanjing Happy Valley in East China's Jiangsu Province, May 1, 2021. (Photo/China News Service)

People cosplay pandas at Nanjing Happy Valley in East China's Jiangsu Province, May 1, 2021. (Photo/China News Service)

Cosplay fans perform at Nanjing Happy Valley in East China's Jiangsu Province, May 1, 2021. (Photo/China News Service)

People wearing Traditional Chinese Costumes Hanfu perform at Nanjing Happy Valley in East China's Jiangsu Province, May 1, 2021. (Photo/China News Service)

People wearing Traditional Chinese Costumes Hanfu perform at Nanjing Happy Valley in East China's Jiangsu Province, May 1, 2021. (Photo/China News Service)