What year's college diploma can't be found in Xue Xin? com？

1992 university diploma can't be found in Xuexin.com. Xue Xin. Com currently provides diploma inquiry, which is academic information since 2002. The academic information of 199 1-200 1 is being upgraded, so it is temporarily impossible to query all the academic qualifications of 199 1-200 1. The answer is not easy, please accept it if you are satisfied.