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.
Therefore, only in accordance with the above provisions, can we directly sign a surveying and mapping contract without bidding.