the time limit for signing a contract after winning the bid is generally within 3 days. Therefore, both parties should pay attention to the time of signing the contract after winning the bid, and sign the contract in time to avoid unnecessary trouble caused by invalid contract. The tenderer and the winning bidder shall, within 3 days from the date of issuance of the bid-winning notice, conclude a written contract in accordance with the tender documents and the bid documents of the winning bidder. The tenderer and the winning bidder shall not conclude any other agreement that deviates from the substantive contents of the contract. The contract must be signed within 3 days from the date of issuance of the bid-winning notice.

after the bidder wins the bid, the bidder and the tenderee can sign a written contract after further negotiation and consensus, and the time limit for signing the contract after winning the bid is generally within 3 days. Therefore, both parties should pay attention to the time of signing the contract after winning the bid and sign the contract in time to avoid unnecessary troubles caused by the invalidation of the contract. If the parties conclude a contract in the form of a contract, the contract shall be established when all the parties sign, seal or fingerprint it. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it. A contract shall be concluded in writing as stipulated by laws and administrative regulations or agreed by the parties. If the parties fail to do so in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.

The bid of the winning bidder shall meet one of the following conditions:

(1) It can meet the comprehensive evaluation criteria specified in the tender documents to the maximum extent;

(2) It can meet the substantive requirements of the tender documents, and the evaluated tender price is the lowest; Except that the bid price is lower than the cost.

Legal basis:

Article 46 of the Bidding Law of the People's Republic of China

stipulates that the tenderer and the winning bidder shall conclude a written contract in accordance with the bidding documents and the winning bidder's bidding documents within 3 days from the date of issuance of the bid-winning notice. The tenderer and the winning bidder shall not conclude any other agreement that deviates from the substantive contents of the contract. If the tender documents require the winning bidder to submit the performance bond, the winning bidder shall submit it. "The tenderer and the winning bidder shall conclude a written contract in accordance with the tender documents within the statutory time limit.