That's when you fill in the information, the date of birth you wrote and the class you attended did not conform to the general regulations. The general system will analyze whether the school you joined and the date of birth you filled in meet the general requirements. For example, if your date of birth is 199 1 year, then you have applied to create your class now, and the application information is to join Senior One in 2005. Then, when you join another school, and the school you join is the university or senior three in 2006, then the system will not let you join the school, and there will be a hint that the year of admission is inconsistent with your existing educational experience. If you have joined your class, and the year you joined the class is different from the year you chose when you joined other schools, the system will still prompt you that the year you entered school is inconsistent with your existing educational experience. For more information, please go to QQ alumni official Q.