Volunteers from Macao and local children watch performance at an acting class 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, southwest China, Aug. 10, 2019. More than 30 student volunteers from south China's Macao offered a week-long teaching service for children in this remote village. Volunteers prepared various classes including painting, acting, science and PE to enrich local children's summer vacation and broaden their horizon. (Xinhua/Huang Xiaobang)

A volunteer from Macao plays a game 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, southwest China, Aug. 11, 2019.(Xinhua/Huang Xiaobang)

Volunteers from Macao and local children gesture during a health class 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, southwest China, Aug. 10, 2019. (Xinhua/Huang Xiaobang)

Volunteers from Macao and local children play a game 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, southwest China, Aug. 10, 2019.(Xinhua/Huang Xiaobang)

Children experience self-made kaleidoscopes during a science class 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, southwest China, Aug. 10, 2019. More than 30 student volunteers from south China's Macao offered a week-long teaching service for children in this remote village. Volunteers prepared various classes including painting, acting, science and PE to enrich local children's summer vacation and broaden their horizon. (Xinhua/Huang Xiaobang)

Volunteers from Macao and local children stage a performance 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, southwest China, Aug. 11, 2019. (Xinhua/Huang Xiaobang)

A volunteer from Macao demonstrates a move to local children during a performance 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, southwest China, Aug. 11, 2019. (Xinhua/Huang Xiaobang)

A volunteer from Macao teaches a child how to use camera at Wuying, a Miao village under joint administration of Rongshui County, south China's Guangxi Zhuang Autonomous Region, and Congjiang County, southwest China's Guizhou Province, Aug. 11, 2019. (Xinhua/Huang Xiaobang)

Volunteers from Macao prepare for a performance 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, southwest China, Aug. 11, 2019. (Xinhua/Huang Xiaobang)

A volunteer from Macao plays a game 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, southwest China, Aug. 10, 2019. More than 30 student volunteers from south China's Macao offered a week-long teaching service for children in this remote village. Volunteers prepared various classes including painting, acting, science and PE to enrich local children's summer vacation and broaden their horizon. (Xinhua/Huang Xiaobang)