Computer marking of college entrance examination, subjective questions such as multiple-choice questions in mathematics, which are not marked on my card, will my writing be scanned on the computer for the teacher to see? I don't think so, because a card without scribbling is blank.

However, it depends. If you just write your name and don't mark the admission ticket number, some kind teachers will help you mark the admission ticket number, but if you don't mark the multiple-choice questions, people will only think that you can't do it and hand in a blank sheet of paper.