You can't. The official seal of a primary education school is generally stamped by the school affairs office or the general affairs office. The administrative official seal is a seal engraved with the name of the unit, which is a sign of cooperation, signing agreement, certification, authorization or entrustment between units to reflect its effectiveness. Don't stamp it rashly, but follow the instructions of the school teacher. Even if it is stamped before the end of the internship period, the chapter of the remedial class may not be found.