From Prison Guard in the Celestial Jail to Lord of the Mortal Realm

Li Qingfeng transmigrated into the body of a lowly prison guard in the Celestial Prison. He was also afflicted with baleful and demonic energy, a condition that would kill him within three days. On top of that, demonic prisoners might break out at any moment, leaving his life hanging by a thread...

But as he locked a prisoner in a cell, an ancient, unadorned prison ledger appeared before his eyes:

[Prisoner: Liu Sanzhong]

[Martial Realm: Seventh Level of Meridian Opening]

[Sin Rating: Three Stars]

[Status: Incarcerated]

[Contribution to Capture: 1%]

[Reward: 5 cultivation points per hour]

P.S. This book is also known as The True Immortal Who Rules the Prison, among other titles...