The power of attorney of a legal person requires the signature or seal of the legal representative, which can be signed or sealed. The signature or seal of the authorized representative required in the power of attorney means that any signature or seal of the authorized representative is valid, that is, only the signature or official seal of the authorized representative can be affixed. But it does not rule out that the signature is stamped at the same time. Therefore, it is ok if the official seal of the company is stamped with the signature of the designated representative.