The heroine accidentally traveled back to the Qing Dynasty due to a car accident.
The Fujin Niu Hulu clan became the fourth elder brother Yinzhen through time travel.
Here Yinzhen is completely obedient to the heroine.
Seizing the line is just a background
This article will be a bit inconsistent with history. The heroine will have a few more children, but the ending will be exactly the same as history.