Go to the school where you took the exam and ask first.
Then go to the education bureau to ask, fill out the application form, and it will be fine after n steps.
When you enter the gate of the Education Bureau, you will consult the counter and say that I want to modify the application information, and he will guide you.
Or if you are brave, just kick the door of the director's office and say, "What do you think if you want to change the application information because of a mistake on the home page?"
The director jumped up angrily and said to him, "whoever comes here is so rude." If someone comes, take this son to Director Zhang next door to pay and fill out the form before discussing. "
You'll know when you go. You may meet someone like you.
It is not uncommon to fill in the wrong form.