The chinese mathematical society Olympic Committee Grade Coaches Examination is held every summer. First of all, you have a second-class certificate. After two years, I need to change it with a second-class certificate and hand in a paper on Olympic Mathematics. After training and passing the exam, a first-class certificate will be issued. There is no requirement to take the second-level certificate, but you have to go through training and pass the exam to get a certificate. Are you satisfied with this answer? If not, please send an email.