The Memory Hole ...

A child’s protest, “No to the policy eradicating Mongolian language and culture.” Courtesy of the Southern Mongolian Human Rights Information Center.

Seems Xi's bent on deleting Mongolia as an entity by replacing Mongolian with Chinese
 in all their schools.  Time frame ... 3 years.

Chinese will become the primary language of instruction from September 1 in all elementary and middle schools starting from September 1 next. This is introduced as “bilingual education,” but in fact several main subjects will be taught in Chinese only, and the program will be extended to high schools, and further increase the use of Chinese, through two other stages, which will start respectively in September 2021 and September 2022. “This is a decision of the Central Government, the teachers were told. It is not a decision of the Autonomous Region’s government.”

Combine this with ubiquitous surveillance 24/7 on all of China points to the fact Xi wants to create 1984 for real. 

"Who controls the past." ran the Pary slogan, "controls the future:
who controls the present controls the past." - George Orwell