How did Fan Ye go to Ziwei Star?

Fan Ye went to Wei Zixing by mistake, because he returned halfway through the coffin parade in Kowloon. Later, I followed Fan Ye back to Beidou. Then a child with the pure blood of the Sun Emperor was saved on Zixing, and their home was destroyed by the Sun family. Later, the child worshipped Fan Ye as a teacher and became a big disciple of Fan Ye.