After the Xianmen Undercover Escaped to Death

The title of the text at the beginning of the article may be changed, but the gist remains the same. Death escape/amnesia/reciprocal children/imprisonment/a widower raising a baby alone/brother-in-law and uncle-in-law (fake) Ji Xuanqing is the lord of the Demon Realm City, but his lover is an undercover agent sent by the Immortal Sect. The day he found out was when Ji Huaiying gave birth. He thought that as long as he pretended not to know, they could still be the same as before. It wasn't until he saw Ji Huaiying feeding poison to their newborn child that he realized how much Ji Huaiying hated him, and he didn't even want to keep the baby who inherited half of his blood. Ji Xuanqing severed Ji Huaiying's meridians, broke all his bones, and imprisoned him in a water prison. He hated Ji Huaiying for deceiving him. Later, Ji Huaiying really died. He kept watch for eighty-one days, but Ji Huaiying still didn't wake up. Three hundred years later, he met a man named Duan Huaixu, whose face was almost exactly the same as Ji Huaiying. The man said that he was Huaiying's brother and wanted to avenge Huaiying. He wanted to take back everything Huaiying had suffered on himself. The gentle and cruel city lord x the cold and amnesiac sword cultivator Duan Huaixu and his younger brother Ji Huaiying are the same person. Duan Huaixu is Ji Huaiying's identity after he died and lost his memory. They are called brothers, but they are actually one person. It's still bloody writing, fighting each other and reinforcing each other. Intention: perseverance