Seeking the title of the novel

This was a novel that traveled back in time to ancient times. It seemed to be a fictional story. I read a book back then, but I'm not sure if it's available online.
The female protagonist transmigrated to a wealthy merchant family. She had no mother, only her father. Her father loved her very much. He had a personal maid. The original owner of this body had a bad temper and was weak and sickly. However, the female protagonist seemed to have practiced martial arts before and even taught a lecher a lesson after transmigrating.
The male protagonist had a younger brother and a younger sister. It was rumored that he was a jinx to his wife and had killed two of his wives. In the end, the novel confirmed that his wife was killed by a woman who admired him. His father wanted him to marry a third wife (this one seemed to have the surname Zhu), and the male protagonist had a quarrel with his father.
I still remember a few scenes:
1. The scene where the male and female leads met for the first time: The female lead saw the male lead. The female lead was on a building by the river at that time. The male lead and his brother were on a boat in the river. At that time, the female lead thought of the phrase,"You are looking at the scenery on the boat, and the person who is looking at the scenery is looking at you from upstairs."
2. The female protagonist taught the lecher a lesson. She used the homonym to make the lecher call her "Aunt" and beat the lecher and his lackey with a shoulder pole of the person next to her. The book described the female protagonist as "the skirt is flying like a tulip."
3. The female lead jumped into the river to save a child, and the male lead saved her
4. I think it's called "Bodhisattva Day" or "Saint Day". I forgot the exact name of the festival. During this festival, the female lead dressed up beautifully. The male lead met the female lead on the street and was stunned. He wondered,"Didn't the daughter of X Manor say that she was weak and sick and wouldn't live long?"
5. A westerner came. No one knew western language, only the female lead knew it. Before the westerner left, he gave the female lead a pencil. The female protagonist said,"Back then, I was recuperating in the mansion. In fact, I went to the West."
6. The female protagonist's father went out to do business and took a boat. The female protagonist sent him off, and her personal maid pulled her tightly, afraid that she would fall into the river.
7. The place where the female protagonist was located had a flood. Because the female protagonist's house was high and the courtyard walls were made of bluestone, it was not easy for water to enter, so the female protagonist's house was safer than other places. Of course, water also entered later. At this time, it happened to be the time when the female protagonist's father returned. She was very worried about her father. Not long after the flood receded, she found out that her father had indeed died on the way back.
8. After the male protagonist and female protagonist got married, their child found a box one day. In the box was the will of the female protagonist's father. Every time her father went out, he would leave a will. However, the female protagonist didn't know that her father left a house full of treasures for her. I remember that this secret room was in the bathroom.
9. The male protagonist's younger brother married the female protagonist's personal maid. The woman who loved the male protagonist and killed the male protagonist's first two wives held the female protagonist and the female protagonist's personal maid hostage with a knife, forcing the male protagonist to go to her. Then, she seemed to be thrown over the shoulder by the female protagonist and fell off the building to her death.
Brothers and sisters, if you know anything, please tell me. Thank you in advance!
There was also a plot in the beginning: The female protagonist came out to shop (not dressed as a man) and saw a lot of people gathered outside a bungalow. She found that the daughter of this family had been raped to death. The female protagonist helped the government solve the case and drew a portrait of the murderer according to the description of the victim's mother.

Answer 1

I'm not a novel title. I'm a fan of online literature, and I want to help people by answering questions. If you have any other questions, I will try my best to answer them.