Love Hidden in the Dust

Twenty-three years ago, in order to secure her entry into the Su family through marriage, Cheng Huinan swapped her infant daughter for a baby boy; consequently, the girl—later named Liuliu—was found and raised by a cleaning lady who became her adoptive mother. Twenty-three years later, Liuliu unexpectedly crossed paths with the Su family's eldest son, Su Mubei. The two fell in love with a sense of destiny, a turn of events that also brought about Cheng Huinan's reunion with her long-lost daughter—yet, meeting as strangers, she subjected her own flesh and blood to relentless torment and abuse.

Synopsis from DramaGo.