The following situations will be treated as invalid bids: (1) No unit seal and the signature or seal of the legal representative or the agent authorized by the legal representative.

(two) did not fill in the prescribed format, the content is incomplete or the key handwriting is illegible.

(3) A bidder submits two or more bid documents with different contents, or a bid document contains two or more quotations for the same project subject to tender, without specifying which one is valid, unless an alternative bid scheme is submitted in accordance with the provisions of the tender documents.

(four) the name or organizational structure of the bidder is inconsistent with the pre-qualification.

(5) Failing to submit a bid bond in accordance with the requirements of the tender documents.