In the Second Generation of the Trench, He Changed To the Ruanfan Script - Chapter 16:

Jiang Chen travels to a fantasy novel world and becomes the villainous senior brother.He didn’t have any golden finger (cheat) and didn’t want to end up as villainous cannon fodder, so he repeated nine reincarnation cycles, only aiming to be an upright senior brother.Yet fate is unjust, bestowing upon him the aura of a villain, causing him to suffer countless misunderstandings and disdain.Until the ‘Tenth Life’!In this life, Jiang Chen gave up. His heart grew cold, and he also finally let himself go.Jiang Chen: “Since heaven wants me to be a villain, why should I defy it?”……My name is Jiang Lianyue, and I have a villainous senior brother who is despicable.I despise him, detest him, and even wish he would die quickly!But one day, I witnessed a flashback of nine lifetimes…In the first life, my senior brother sacrificed his own core to help the second brother rebuild his core, damaging his own foundation in the process.In the second life, I was afflicted with a cold poison, and my senior brother, with his modest cultivation, refined pills for a hundred days to cure me at the cost of destroying his own core.In the third life, I finally understood everything…

Son of a bitch! I just finished this godawful fantasy novel, and now I'm knee-deep in it – as David, the disgraced son of the Solarian Empire's top general! Talk about some twisted cosmic joke. But hold on a damn minute... maybe this isn't all bad. Armed with the knowledge of that trashy plot, I can become the ultimate shadow player, an overlord perhaps. Screw the damsel-in-distress harem too – it's time to pull the strings and become the real power behind the throne. This isekai might be a steaming pile, but I'm rewriting the ending with a little more... Debauchery (wink wink).

Ever since he was little, Xi Jia’s yin energy was strong, and every day he saw ghosts and ran into ghosts. One day, he accidentally broke the protection amulet. Celestial Master Ye Jingzhi happened to pass by and helped. Are ghost catching Celestial Masters all legit masters? WeChat official accounts, Taobao online shops, looking at gossip tabloids every day. Since then, Xi Jia has refreshed the lower limit again and again, and met a group of completely unreliable Celestial Masters. Binding spirits, doppelgängers, the Mausoleum of the First Qin Emperor, the ghost market of Poyang… The door to a new world is slowly opening.

Set in an urban city with supernatural elements, this is a love story between Xi Jia, who has a body of extreme yin, and Celestial Master Ye Jingzhi, nicknamed the King of Hell. The seemingly weak Xi Jia, in actuality, can rip apart ghosts with bare hands; the seemingly cold Ye Jingzhi, in actuality, is shy and gentle. A marriage contract binds the fate of two people together. See how the two people overturn the heavens in the gossipy and wacky metaphysical world.

- Description from Novelupdates