*Overdue or not delivered to the designated place.
*The bid document is not sealed, or the sealed place is not stamped with the official seal of the company and the seal of the legal representative or the entrusted agent
*The tender document is not stamped with the official seal of the unit and the seal of the legal representative or the entrusted agent.
*The bid is not for this bidding project
*The bidding document is not prepared according to the provisions of the bidding document or fails to respond to the requirements of the bidding document.
*The key contents of the tender document are illegible and illegible.
*The bidder submits two or more bidding documents with different contents, or offers two or more prices for the same bidding project in one bidding document, and does not declare which one is valid.
*The name or organizational structure of the bidder is inconsistent with the prequalification. *The bidder fails to provide the bid security in accordance with the requirements of the bidding documents.
*The legal representative or entrusted agent of the bidder fails to attend the bid opening meeting on time or fails to provide valid certificates. *The bidder fails to provide the original copy of the project manager's certificate at the time of bid opening.
*Relevant certificates and original certificates provided are altered, transferred or false materials are provided.