Artists perform folk chorus during the opening ceremony of the 6th China Nie Er Music (Chorus) Week held at Yunnan Grand Theater in Kunming, capital of southwest China's Yunnan Province, July 17, 2019. A series of activities will be held in Kunming and Yuxi of Yunnan from July 17 to 21. (Xinhua/Qin Qing)

Children from Chinese and French choruses perform during the opening ceremony of the 6th China Nie Er Music (Chorus) Week held at Yunnan Grand Theater in Kunming, capital of southwest China's Yunnan Province, July 17, 2019. A series of activities will be held in Kunming and Yuxi of Yunnan from July 17 to 21. (Xinhua/Qin Qing)

Artists perform during the opening ceremony of the 6th China Nie Er Music (Chorus) Week held at a branch venue in Yuxi, southwest China's Yunnan Province, July 17, 2019. A series of activities will be held in Kunming and Yuxi of Yunnan from July 17 to 21. (Xinhua/Hu Chao)