Book of Reincarnation and Life and Death

In the infinite world, there is a book of life and death that records the death missions of all heavens and realms. Li Ming kindly helped an old classmate whom he had not contacted for many years, but was tricked into a place called [Time and Space Travel Agency] by the old classmate. Here, every member needs to perform death missions. After returning from his first death mission, he just wanted to find that old classmate and chop that old classmate into eight pieces.