The heroine personally waged wars and conquered the world. In her previous life, she had no understanding of people and was eventually defeated by her son-in-law and took the throne. Of course, she will let him go as far away as possible in this life. And, what I appreciate most about the heroine is that although the general in her previous life was a good person, she has never been with him directly in this life. After all, different life experiences are likely to create two different people.
The heroine traveled to an imaginary era similar to the Spring and Autumn Period and the Warring States Period and was almost sacrificed. After escaping, she obtained a barrage plug-in and accidentally became a princess. In order to avoid being randomly married, of course she had to become a queen.
The heroine was engaged in invention and business in a similar 19th century Britain, and finally ended up with the Duke. The advantage is that the description is detailed and the science popularization is sufficient, but the disadvantage is also the same. Sometimes the water is overwhelming.
In the 1990s, the heroine relied on the system and her own hard work to live a life. She started making tofu and making money, enjoying ordinary daily life with a slow and leisurely pace. The disadvantage is that sometimes the plot logic is not very reasonable.