From Digital Chosunilbo (Daily News in English About Korea):
Ever-vigilant over what it sees as Japan’s distortions of history, China is pushing ahead with some rewriting of its own to suppress mention of a separate Korean identity in its textbooks. The Chinese Foreign Ministry in August last year erased reference to some pre-1948 Korean history on its website, and now all accounts of pre-modern Korean history, including the Koguryo kingdom, are gone from a world history textbook for ethnic Korean- students in Yanbian, Jilin Province.
Uri Party lawmaker Yoo Ki-hong, who recently visited China, said the new Korean-language middle school textbook omits all mention of Korean history from the three ancient kingdoms to the Chosun era.