According to the relevant public information, Shougang material list is put forward in the name of the unit and stamped with the official seal of the unit; In the name of an individual, the work unit and contact number must be provided and signed by himself, otherwise it will have no legal effect, so an official seal is needed.

The inspection contents of Shougang's material certificate include: the steel material certificate must arrive with the vehicle; Check whether there is QS mark on the material book; Distinguish whether the material book is overprinted or forged; Check the seal of the material book receiving unit, etc.