After the family fell, I wanted to lie down

Fictional story + time travel from the present to the past + heroine + court + strategy + disguised as a man, the hostess is sober. Yingge was originally a killer in the modern era. After being backstabbed by her teammate, she traveled to an unknown dynasty. Her widowed mother took her to live with others. She only wanted to go to school and become a teacher, but she didn't expect that the host she had been staying with was a minister of their family, and her widowed mother was her mother's maid. She seemed to be free, but she was surrounded by a group of subordinates who were worried about her all day long. The scams were one after another, and they asked if there was anything else she didn't know. Could you please tell her clearly at once? ...