No regrets. Walking means that the person who is walked does not go through some preliminary procedures such as written examination, but evaluates the students' academic performance and comprehensive quality through an evaluation form. Everyone has different ideas and goals. Going to the Chinese Academy of Sciences is to pursue one's own goal, and it is a son's personal choice, and he will not leave regrets. Direct doctoral students are all called undergraduate direct doctoral students, which means that after graduating from undergraduate this year, they skip the postgraduate stage and study for doctoral degrees directly as doctoral students.