How can one know the devil

There is a young man in wanzhang Valley who is Li Zhiyan. The reason for his name is that when he was born, there was no other note. There are only eleven words, "knowing mistakes can change, being good is great, Li Zhiyan". But this is clearly a swaddling baby. Why are there such admonitions for him? Is it true that someone is wrong in his life? Whether it is this person or this thing that is wrong, with confusion, the young man stepped into the world to find the ethereal answer.