Soprano Cai Nan (L) and Xia Yu from China National Opera House sing during a benefit performance in Youyang Tujia-Miao Autonomous County, southwest China's Chongqing Municipality, Jan. 13, 2020. Artists from China National Opera House have given three lectures on singing and staged five benefit performances for local people in Pengshui, Youyang and Shizhu in three days. (Xinhua/Wang Quanchao)