Why is Wei Zi so accurate in calculating my birthday? People are born to be good?

Accuracy is basically in the moment of shipment, but to get to Ryutsuki accurately depends on how good it is and how lazy it is. Do you think if a student with natural mental retardation lives in Wang Jianlin's house, he will survive? It is normal for a person to live a long life, but it turns out that the timing is not good and Dick was killed. Everything depends on yourself, whether it is to show the way or to do things by yourself.