TAIPEI, Taiwan -- A Chinese-Canadian singer says a Chinese corruption charge against her mother, who has been held in custody for six years, has been withdrawn but she remains in detention.Wanting Qu, 36, who has lived in Canada since she was a teenager, shared a social media post by her aunt saying that prosecutors in Harbin had withdrawn the charge of embezzling $54 million (350 million yuan) in 2019, but that her mother has still not been released.