I Have No Money to Be Reincarnated, so I Am Cultivating Ghosts and Immortals in the Underworld.

Programmer Song Ming died suddenly while working overtime, but because of the high cost of "reincarnation in the underworld", he had no choice but to sign a "cow horse" agreement, and became a soul-destroying ghost at the bottom of the underworld - high-risk, cheap, and without guarantees. Relying on his professional instinct, he found a system bug in the worthless "Experience of Immortal Cultivation and Reincarnation" that induced consumption, and stole the "Ghost Cultivation Technique" that was strictly prohibited by the underworld. However, he soon discovered that the underworld was not the end of the dead, but a frontline fortress that suppressed the "emptiness" that devoured all things. Although the power of ghost cultivators can resist the powerful ghosts, it is also corroding his sanity and aggravating the restlessness of the abyss. The secret guarded by hundreds of thousands of Yin soldiers, the truth behind the strictly forbidden martial arts, and his own survival... Holding a double-edged sword in hand, Song Ming can break the deadlock and find a glimmer of hope in this eternal war to protect the three realms?