The bidding law stipulates that:

1. Bidders shall not collude with each other in bidding quotation, and shall not crowd out the fair competition of other bidders, thus harming the legitimate rights and interests of the tenderee or other bidders.

2. A bidder shall not collude with the tenderee to bid, which will damage the interests of the state, the public or the legitimate rights and interests of others.

3. Bidders are prohibited from winning the bid by bribing the tenderee or members of the bid evaluation committee.

4. If bidders bid in collusion with each other or with the tenderee, and the bidders seek to win the bid by bribing the tenderee or members of the bid evaluation committee, the bid will be invalid, and a fine of more than 5% but less than 11% of the amount of the winning project will be imposed, and a fine of more than 5% but less than 11% of the amount of the unit fine will be imposed on the directly responsible person in charge and other directly responsible personnel; If there is illegal income, the illegal income shall be confiscated; If the circumstances are serious, it shall be disqualified from participating in the bidding for projects that must be subject to tender according to law within one to two years and shall be announced until its business license is revoked by the administrative department for industry and commerce; If a crime is constituted, criminal responsibility shall be investigated according to law. If losses are caused to others, they shall be liable for compensation according to law.

Legal basis:

Article 32 of the Bidding Law of the People's Republic of China

Bidders shall not collude with each other in bidding and quotation, and shall not crowd out the fair competition of other bidders, thus harming the legitimate rights and interests of the tenderee or other bidders.

A bidder shall not collude with the tenderee in bidding, which will harm the national interests, social interests or the legitimate rights and interests of others.

It is forbidden for bidders to win the bid by bribing the tenderee or members of the bid evaluation committee.

Article 53 Where bidders bid in collusion with each other or with the tenderee, if the bidders seek to win the bid by bribing the tenderee or members of the bid evaluation committee, the bid will be invalid, and a fine of more than 5% but less than 11% of the amount of the winning project will be imposed, and a fine of more than 5% but less than 11% of the amount of the unit fine will be imposed on the directly responsible person in charge and other directly responsible personnel; If there is illegal income, the illegal income shall be confiscated; If the circumstances are serious, it shall be disqualified from participating in the bidding for projects that must be subject to tender according to law within one to two years and shall be announced until its business license is revoked by the administrative department for industry and commerce; If a crime is constituted, criminal responsibility shall be investigated according to law. If losses are caused to others, they shall be liable for compensation according to law.