Valid residence certificate of both parents or legal guardians in Linping City, labor contract of one parent or legal guardian in Yuhang District, and endowment insurance paid by one parent or legal guardian in Yuhang District. The above conditions must be more than one year and must be handled normally and continuously. Among them, parents do not need to prepare social security certification materials, and Linping Education Counseling Station conducts unified inquiries according to parents' information.