The Simple Life of Killing Demons - Chapter 2Book 3:

Having being plagued by same dream for the past six years, Chu Yanshen discovered a little boy who looked just like him out of the blue. It was only then did he, Chu Yanshen, learn that he had been deceived by the little lass six years ago…

- Description from Novelupdates

Wei Long, a highly decorated soldier, is sent on a classified mission with a single objective: to ensure this is his final mission. However, events take an unexpected turn when he and his team located their target—not a normal Dinosaur but a BIO-ENGINEERED DINOSAUR designed by a shadowy organization to be the ultimate predator, created to dominate all life.Despite their best efforts, the team proves no match for the beast. In an unforeseen twist, Wei Long manages to kill it, but not without sacrificing his own life in the process.Yet, death is not the end for Wei Long.He awakens in a strange and mystical cultivation world—reborn as a baby dinosaur. Weak and disoriented, he struggles to make sense of his new existence, only to uncover something astonishing: a translucent screen revealing that his new body possesses the same bio-engineered traits as the monster he once destroyed.Now, as a creature designed to be the ultimate predator, what will happen when Spiritual Qi is introduced into its body? Will he succumbed to its Bio-engineered predatory instinct or he would make use of it?

This is probably the story of a modern man who became the Seventh son of Kangxi in the Qing Dynasty. This is probably the story of how the Seventh brother Yinyou worked hard and fell in love by the way. So there is no doubt that this article is ambiguous, and it is easy to guess who the couple is.

- Description from Novelupdates

I met the male lead in prison.