Actors wait before Yulei lantern opera in Yuleiping village in Wenxian county of Longnan City, northwest China's Gansu Province, Feb. 12, 2017. With more than 300 years history, the Yulei lantern opera has become a provincial intangible cultural heritage in Gansu. Its name comes from the lanterns hanged over the stage for lighting. Today, more and more young performers joined in the opera to protect the folk and ancient art. (Xinhua/Xin Yuewei)