1. According to Article 66 of the Bidding Law of People's Republic of China (PRC)? ：
Involving national security, state secrets, emergency rescue and disaster relief, or using poverty alleviation funds to implement projects that are not suitable for bidding under special circumstances such as the need to use migrant workers, in accordance with relevant state regulations, bidding may not be carried out.
Two. According to Article 9 of the Regulations for the Implementation of the Bidding Law of People's Republic of China (PRC):
Except for the special circumstances stipulated in Article 66 of the Bidding Law, no bidding shall be conducted under any of the following circumstances:
1, which requires irreplaceable patents or proprietary technologies;
2. The purchaser can build, produce or provide it by himself according to law;
3. Investors who have selected franchise projects through bidding can build, produce or provide them by themselves according to law;
4. It is necessary to purchase the project, goods or services from the original winning bidder, otherwise the construction or functional requirements will be affected;
5. Other special circumstances stipulated by the state.
Extended data
A tenderer who commits one of the following acts shall restrict or exclude potential bidders or bidders with unreasonable conditions:
1. Provide different project information to potential bidders or bidders of the same project subject to tender;
2. The qualification, technology and business conditions set are not suitable for the specific characteristics and actual needs of the project subject to tender or have nothing to do with the performance of the contract;
3, according to the law, the project must be subject to tender with the performance of a specific administrative region or a specific industry, awards as a plus condition or winning conditions;
4. Adopt different qualification examination or evaluation criteria for potential bidders or bidders;
5. Restrict or designate specific patents, trademarks, brands, countries of origin or suppliers;
6. Illegal restrictions on the ownership or organizational form of potential bidders or bidders for projects that must be subject to tender according to law;
7. Restrict or exclude potential bidders or bidders with other unreasonable conditions.
In any of the following circumstances, the bid evaluation committee shall reject its bid:
1. The bidding documents are not stamped by the tendering unit and signed by the person in charge of the unit;
2. The bidding consortium failed to submit the same bidding agreement;
3, the bidder does not meet the qualifications stipulated by the state or the tender documents;
4. The same bidder submits two or more different bid documents or bid quotations, except that the tender documents require the submission of alternative bids;
5. The bid price is lower than the cost or higher than the highest bid price determined in the tender documents;
6, the bid documents did not respond to the substantive requirements and conditions of the tender documents;
7. The bidder has colluded in bidding, fraud, bribery and other illegal acts.
Taizhou Water Conservancy Bureau: Regulations for the Implementation of the Bidding Law of People's Republic of China (PRC).
Xinjiang Prison Administration: Bidding Law of People's Republic of China (PRC)