Zhou Jingran was forced to take over the "time settlement" work - every minute of delay, one reality will be erased by Cthulhu-style cause and effect. Tang Nanqing appears to be a calm colleague, but in fact he has a black list that can "change accounts". The two of them were doing tasks in the countdown while complaining and killing each other: when the world starts to use you as a budget, the only way to survive is to write the account back - let the monster pay the interest first.