Zhao Yi was a bit frustrated.
In the field of mathematics, he had indeed achieved some success, mainly due to his system capabilities. He learned the basics through self-study, which involved reading books and mastering some foundational knowledge.
Therefore, he was somewhat weak in the basics of mathematics.
Undergraduate-level advanced mathematics was not very difficult for him. However, advanced mathematics is a comprehensive subject, and there were some areas he hadn't mastered yet. A systematic study of the subject would probably be beneficial to him.
Computer science, on the other hand, wasn't a concern.
C programming language is a widely-used programming language in work and research. The introductory knowledge would seem outdated and designing simple algorithms like a beginner would hold no significance for him at all.
"I still need to learn advanced mathematics, but what if there's no course available..."