Tenor Xu Sen from China National Opera House sings during a lecture in Pengshui Miao-Tujia Autonomous County, southwest China's Chongqing Municipality, Jan. 12, 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)