Troupers perform Tibetan opera at the Xizha scenic area in Wuzhen, east China's Zhejiang Province, Oct. 23, 2018. A Tibetan opera troupe from Ngamring County of Xigaze staged a Tibetan opera performance here from Oct. 23 to 28. The Tibetan opera, dated back to over 600 years ago, was put on the world heritage list of the oral and intangible heritage of humanity in 2009. (Xinhua/Zhang Rufeng)