Yeah, Korea has many kpop stars that aren't actually korean, in this case it was the group Twice, pretty famous might have heard of it, there's 5 korean members, 3 japanese, and one Taiwanese, Tzuyu who's been huge in the kpop world (At some point she was nª3 in popularity polls).

And in a tv show where they had each member hold a flag of their home country she had the Taiwanese one, and China got to accuse her of separatism, cancelled all of Twice concerts in China, and was banned from Chinese TV, she lost contracts with Huawei, and the label posted a video apology of her saying stuff like "There is only one China, the two sides of the strait are one, and I have always felt proud to be Chinese" while looking absolutely dejected, and that was right before the elections that Tsai Ying Wen won.