Legal Analysis: Invitation to tender may be carried out upon approval in the following cases:
(1) Where the project is technically complex or has special requirements, and there are only a small number of potential bidders to choose from;
(2) Where it is limited by the natural territorial environment;
(3) Where it involves national security, state secrets, or disaster relief, and it is appropriate to invite bids, but it is inappropriate to invite bids publicly
(D) the cost of the proposed public tender compared with the value of the project, it is not worth it;
(E) laws and regulations are not suitable for public tender.
Legal basis: the Chinese people's **** and the state bidding and tendering law Article 31 Two or more legal persons or other organizations may form a consortium to bid as a single bidder **** the same tender. All parties to the consortium shall have the appropriate ability to undertake the bidding project; the relevant provisions of the state or the bidding documents on the qualifications of bidders, the consortium shall have the corresponding qualifications specified. The consortium consists of units of the same specialty, in accordance with the qualification level of the lower unit to determine the qualification level. The consortium shall sign *** with the bidding agreement, a clear agreement on the work and responsibilities to be undertaken by all parties, and will *** with the bidding agreement together with the bidding documents submitted to the bidder. The consortium won the bid, the consortium shall *** with the bidder to sign a contract on the winning project to the bidder to assume joint and several liability. The bidder shall not force the bidders to form a consortium *** with the bidding, shall not limit the competition between the bidders.