Can the factory certificate be used as the evaluation standard of tender documents?

Yes, this is a loophole in the law. It is not illegal to designate any patent. Obviously, the manufacturer intended by the tenderer has obtained the patent, which has advantages over other manufacturers and scores more points, so it is ok to use it as a scoring item. Decree No.87 of the Ministry of Finance: Article 17 Buyers and procurement agencies shall not take the scale conditions such as the registered capital, total assets, operating income, employees, profits and tax payment of bidders as qualification requirements or evaluation factors, nor shall they take the authorization, commitment, certification and endorsement of manufacturers other than imported goods as qualification requirements, so as to treat bidders differently or discriminately.