Singer Lao Lang (3rd R) performs during an event celebrating the 20th anniversary of Midi, one of China's first original music festival brands, in Chengdu, southwest China's Sichuan Province, Sept. 5, 2020.

People watch performances during an event celebrating the 20th anniversary of Midi, one of China's first original music festival brands, in Chengdu, southwest China's Sichuan Province, Sept. 5, 2020.

A singer of a band interacts with audiences during an event celebrating the 20th anniversary of Midi, one of China's first original music festival brands, in Chengdu, southwest China's Sichuan Province, Sept. 5, 2020.

Singer Lao Lang (C) performs during an event celebrating the 20th anniversary of Midi, one of China's first original music festival brands, in Chengdu, southwest China's Sichuan Province, Sept. 5, 2020. (Photos: Xinhua)

Singer Gao Hu performs during an event celebrating the 20th anniversary of Midi, one of China's first original music festival brands, in Chengdu, southwest China's Sichuan Province, Sept. 5, 2020.

A band member performs during an event celebrating the 20th anniversary of Midi, one of China's first original music festival brands, in Chengdu, southwest China's Sichuan Province, Sept. 5, 2020.

Singer Lao Lang (C) performs during an event celebrating the 20th anniversary of Midi, one of China's first original music festival brands, in Chengdu, southwest China's Sichuan Province, Sept. 5, 2020.