A Murderous Affair in Horizon Tower Episode 10

Doctor Li (Ye Mei Li) met the Zhong family in the emergency room when Zhong Jie came in with bruises and cuts, claiming she had accidentally fallen. Young Mei Bao tells Doctor Li that her mother's husband beat her and Li tells her to call the police if it ever happened again. It did and Mei Bao called the police, and he gets arrested. From that day onwards, Doctor Li gets entangled in the family's affairs. After many incidents, Zhong Jie leaves her husband and moves in with Mei Li with the kids. For a while, things are good but then Yan Yong Yuan returns and starts harassing her. They decide to run away somewhere he can't find them but he finds out and stops Zhong Jie, leading to her suicide. Mei Li takes the children to the train station but at the last moment, Mei Bao escapes, leaving Ah Jun with Mei Li. (Source: Autumn carrot at MyDramaList)