(CNN)Ethnic Mongolian students and parents in northern China have staged mass school boycotts over a new curriculum that would scale back education in their mother tongue, in a rare and highly visible protest against the ruling Communist Party's intensified push for ethnic assimilation.
How China's new language policy sparked rare backlash in Inner Mongolia
Under the new policy, Mandarin Chinese will replace Mongolian as the medium of instruction for three subjects in elementary and middle schools for minority groups across the Inner Mongolia Autonomous Region, home to 4.2 million ethnic Mongolians.
Authorities have defended the adoption of a national standardized curriculum -- which comes with Chinese textbooks compiled and approved by policymakers in Beijing -- will improve minority students' paths to higher education and employment.
But parents fear the move will lead to a gradual demise of the Mongolian language, spelling an end for the already waning Mongolian culture.
To critics, the policy bears a chilling resemblance to measures rolled out in the regions of Tibet and Xinjiang, where Mandarin has replaced ethnic minority languages as the instruction language in most schools. It also reflects a shift in the Party's policy towards more aggressive assimilation under President Xi Jinping, as evident in the harsh crackdown on the mostly Muslim Uyghur minority in Xinjiang.
This week, as students across China returned to classrooms for the new school year, many ethnic schools in Inner Mongolia remained empty as parents refused to send their children back, ac