Photo taken on May 16, 2019 shows Chinese musical instrument Xiao at a studio in Cangzhou, north China's Hebei Province. Xiao is a vertical end-blown flute which is generally made of bamboo. It has one blowing hole and several finger holes and is used in Chinese traditional and classical music. It has soft volume and slow and lyrical tunes. Its mellow and graceful sound is suitable for both solo playing and ensemble pieces with other instruments. (Xinhua/Fu Xinchun)