In this aerial photo taken on Feb. 16, 2019, a Gaoshan Opera performance is staged in Liujiawan Village, Yulong Township of Wudu District, Longnan, northwest China's Gansu Province. Longnan's Gaoshan Opera originated in present-day Wudu District more than 700 years ago, and it has been listed as one of China's intangible cultural heritages. Featuring a unique choreography that re-enacts everyday life scenes, this folk opera is typically performed to mark the Lantern Festival, the last day of the Chinese Lunar New Year celebrations. (Xinhua/Cai Yang)