After handing the exam paper to Chu Molin, the several invigilating teachers began to review and grade Chu Molin's answers.
With every question they read, the more baffled they became, as a lot of these questions were conceived by themselves, and it was highly unlikely that others would have got the answers and leaked them to Chu Molin beforehand.
That is to say, these questions did not exist before; they were randomly created by these teachers after they received the news yesterday. Therefore, it was impossible for Chu Molin to have cheated, and the only explanation for this situation is that the Major named Chu Molin has encountered similar questions before.
Or, he has been exposed to this kind of problem-solving model, especially this method of solving problems, which is exceptionally innovative and easy to understand.