Children of a Mongolian kindergarten play on the playground in Darhan Muminggan United Banner, north China's Inner Mongolia Autonomous Region, June 23, 2017. Back in 1947, there were only 22,000 students of ethnic minorities in Inner Mongolia. After 70 years' development, over 300,000 students receive bilingual education, mainly in Chinese and Mongolian, in 502 ethnic schools. (Xinhua/Ren Junchuan)