Too old.

You can ask Guang 'an Education Bureau.

The student registration number is generated on the basis of the student ID number. One person, one number, will accompany the student's whole study career and remain unchanged for life in principle. There are three types of student registration numbers: official student registration numbers prefixed with "G", temporary student registration numbers prefixed with "L" and student registration numbers prefixed with "J". The more common ones are the official student number prefixed with "G" and the temporary student number prefixed with "L".