The Reborn Eldest Sister Is Poisonous

The heroine traveled through time and became the head of the Xiao family. She used her business experience in her previous life to revive the glory of the Xiao family. At the same time, her five younger brothers were extremely naughty and caused trouble for the heroine from time to time. Afterwards, the heroine settled the five brothers and got involved in the struggle for the throne, offending the new emperor and the Xiao family. After being destroyed, the heroine joins Prince Xiaoyao's team to overthrow the new emperor and becomes a female strategist in the army. She captures cities one after another and reaches Kyoto. Three of her brothers are killed for helping the heroine. Finally, Prince Xiaoyao ascends the throne and becomes the emperor, and the heroine reopens the Xiao family store. The first part was okay, but later on when the heroine became a strategist, I felt speechless. A person who was a modern business person in the previous life and became a strategist who made decisions on the battlefield, still felt that it was a bit too much. Also, there were some holes dug in the book but not filled in. Is it telling people who read this book that they can only understand but not explain? Also, if it is stated at the beginning that the age of the heroine is 22 or 23 years old, it would not be realistic in ancient times because the heroine was engaged to be married. Although it was said that before the heroine time traveled, the heroine's original body broke off the engagement because the man thought the heroine's family was starting to decline. All in all, it's a bit confusing. It seems that the heroine is smart and capable, but in the end, you will wonder who the heroine is?