A volunteer from south China's Macao gestures on a health class with local children at Wuying, a village of Miao ethnic group under joint administration by Rongshui County in Guangxi Zhuang Autonomous Region and its neighbouring Congjiang County of Guizhou Province, Aug. 10, 2019. Local students' summer vacation has been enriched in recent years as more and more residents were lifted out of poverty. (Xinhua/Huang Xiaobang)