1. The tenderee (intermediary) colludes with the bidder. Bidders collude with bidders to disclose information that may affect fair competition to specific bidders. For example, in the bidding of a project with a pre-tender estimate, the tenderer privately discloses the pre-tender estimate to a specific bidder, so that it can win the bid at the price closest to the pre-tender estimate. 2. Partner compensation system. Manager Li said that through the circle of acquaintances that has been formed, bidders will first privately determine the winning enterprises, and then everyone will participate in the bidding together. By default, when the winning bidder wins the bid at a high price, other bidders will be given "compensation fee for accompanying the bid" according to the compensation method agreed in advance, so as to eliminate the competition among bidding enterprises. 3. Realize monopoly by joining. Zhu Yinglong said that this situation mostly happens to a few individual (private) buildings or contractors with low qualification level and lack of certain construction capacity. By linking a number of enterprises with different qualifications and participating in bidding in the name of a number of enterprises at the same time, a substantial bidding monopoly is formed. No matter which company wins the bid, it can get high returns. At the same time, some enterprises or individuals who do not have relevant qualifications can enter the business field that they could not enter originally. 4. Discriminatory treatment. The tenderer discriminates against the same or similar bids of different bidders by manipulating the expert review committee; Even in some tenders with the lowest bid price, the tenderer determines other lowest bids as invalid bids for various reasons to ensure that a specific bidder wins the bid. 5. Tailor-made bidding. The tenderer deliberately sets some unreasonable requirements in the prequalification or bidding documents, and conducts "tailor-made bidding" for specific bidders with intention, so as to crowd out other bidders or potential bidders and manipulate the winning result.
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