I don't know the specific reason, but his second son is studying for a doctorate in Britain, and his second daughter-in-law (Gu) has no ability. After going to an Asian country for gold plating, she went to the "Hanban/Confucius Institute Headquarters" (the institution directly under the Ministry of Education) as the director. If the Ministry of Education has no interpersonal relationship, it will never be able to enter Hanban. If Gu does not have such a good father-in-law, I believe that with her strength, she is incapable of becoming a director.