Children attend Mandarin class at a primary school in Jinghong, Xishuangbanna, southwest China's Yunnan Province, Nov. 20, 2018. The school has a total enrollment of 712 students, most of whom are from Jinuo ethnic group. Jinuo is one of China's smallest ethnic groups with a population of over 20,000. In recent years, local government has carried out many measures to improve education for Jinuo children here. (Xinhua/Lin Yiguang)