No refund. After the bid-winning notice is issued, if the winning bidder abandons the winning project without justifiable reasons and does not sign a contract with the tenderer, it is a breach of contract, and the tenderer may confiscate the bid bond of the winning bidder. Bid bond refers to a certain form and amount of bid responsibility guarantee submitted by the bidder to the tenderer with the bidding documents in the bidding activities.

The main guarantee is that the bidder shall not cancel the bidding documents after submitting them, and shall not conclude a contract with the tenderer without justifiable reasons after winning the bid, and shall not put forward additional conditions to the tenderer when signing the contract, or fail to submit the performance bond according to the requirements of the bidding documents, otherwise the tenderer has the right not to return the bid bond submitted by him. The specific scope and scale standards of the projects listed in the preceding paragraph shall be formulated by the development planning department of the State Council in conjunction with the relevant departments of the State Council and submitted to the State Council for approval. Where the law or the State Council has provisions on the scope of other projects that must be subject to tender, such provisions shall prevail.

The bid bond mainly includes the following provisions:

(1) For construction projects, the bid bond generally does not exceed 2% of the total bid price.

(2) For survey and design projects, if the tender documents require bidders to submit a bid bond, the amount of the bond shall generally not exceed 2% of the survey and design fee, and the maximum amount shall not exceed 654.38+10,000 yuan.

(3) For government procurement projects, the amount of bid bond stipulated by the bidding procurement unit shall not exceed 1% of the estimated budget of the procurement project.

Legal basis:

Bidding Law of People's Republic of China (PRC)

Article 1 This Law is formulated with a view to standardizing bidding activities, protecting national interests, social public interests and the legitimate rights and interests of parties involved in bidding activities, improving economic benefits and ensuring project quality.

Article 3 The following construction projects within the territory of People's Republic of China (PRC), including engineering survey, design, construction, supervision and procurement of important equipment and materials related to engineering construction, must be subject to tender:

(a) large-scale infrastructure, public utilities and other projects related to social interests and public safety;

(2) Projects that are wholly or partially invested with state-owned funds or financed by the state;

(3) Projects that use loans or aid funds from international organizations or foreign governments.