Does the questioner want to ask "Is it illegal for the bidder's trademark to appear in the bidding documents?" Illegal. According to the "Regulations on the Implementation of the Tendering and Bidding Law", we learned that the presence of a bidder's trademark in a bidding document is one of "restricting or excluding potential bidders or bidders with unreasonable conditions". Brand trademarks constitute tendencies and exclusivity, and are Illegal. Investment promotion is a kind of commodity trading behavior and is two aspects of the transaction process.