What did the fortune teller mean when he said he met Taibai Star?

His father told his fortune when he was born, ah! That's scary! This boy, his life is too big to support. I have to turn to a fortune teller. The fortune teller said: There is a white Venus in the sky. Your child's name is also Li Bai, just add a word! Just call it Taibai. Now even the Yan dare not offend him! Sure enough, the child is not sick and easy to grow up. Later, he became a great poet. Hey! This is life!