I Was Kicked out of the Hero's Party Because I Wasn't a True Companion so I Decided to Have a Slow Life at the Frontier - Chapter 87

Cho Ryu Hyang was good at math from a young age. When he enrolled into the The Theoretical Maths and Martial Arts School, the teacher, Jo Gi Chun, recognized Cho Ryu Hyang’s talent immediately and took him in.

Xie Changgeng, the governor of Hexi, married Mu Fulan, the princess of Changsha.

Xie Changgeng, who had not even seen what his bride looked like on their wedding night, finally returned home after more than half a year only to find that she had returned to her parents’ home.

Although very dissatisfied, he could only chase after her.

- Description from Novelupdates

It was supposed to be a perfect deal in which both parties got what they needed. However, after the child was born, he tore up the agreement with discontent and told her, “Who said that we’d only have one child? I want twins! Twin brother and sister! You’ll continue giving birth to more children until you bore me a pair of twins!”

On the day of her escape from prison, she had died unexpectedly and was reborn into the body of Madam Huo.