It means studying at school on a certain day of a certain month of a certain year, and the witness is XXX. Since your primary school. For example: Time School Reference 1997.9. ——200 1.7 xxx primary school xxx200 1.9——2004.7 xxx middle school xxx2004. .9 —— 2007.7 xxx Middle School XXX is probably in this format, so you have a student registration form. Just fill in the form given to you by others.