Find a novel where the female protagonist is an assassin, who became an abandoned concubine after transmigrating to ancient times, and gradually became powerful?

Dear, I recommend the following novels to you: 1. " The Phoenix Defies the World, Northern Moon Chapter ": The female lead was beautiful and was a killer from the 21st century. She traveled to ancient times and became a useless abandoned woman. However, she did not give up. She became stronger and stronger and finally turned the tables. 2. The heroine was also a killer from the 21st century. She traveled to ancient times and became an abandoned wife. However, she didn't give up. She became stronger and stronger and finally unified Feng Wu. I hope you like my recommendation. Muah!