2. The purchased goods are patented products or exclusively created, and there are no other substitutes in the market.
3. In case of unforeseen emergency, it is impossible to obtain the required materials or services from other suppliers in time, and you can also purchase from a single source.
4. In order to ensure the consistency of the original procurement items or the continuity of service packages, when it is necessary to purchase additional goods or services from the original suppliers, and the total amount of additional purchase funds does not exceed 1% of the original contract amount, single-source procurement can also be adopted.
5. When public bidding or other procurement methods are unsuccessful and the original bidding contract terms have not been significantly changed, single-source procurement can be considered.
6. In the case of emergency procurement, when unexpected events lead to abnormal emergencies, and the conventional procurement process cannot meet the timeliness requirements, single-source procurement can provide necessary flexibility.
7. When the subject matter of procurement has a single source, and products, projects or services can only be provided by specific suppliers for reasons such as technology, technology or patent protection, and there is no other reasonable alternative, single-source procurement becomes a necessary choice.