Soprano Cai Nan (R), Xia Yu (C) and mezzo-soprano Yang Jinxia from China National Opera House warm themselves before a benefit performance in Shizhu Tujia Autonomous County, southwest China's Chongqing Municipality, Jan. 15, 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)