The projects that do not need bidding for railway station construction are as follows.

1. designing national security, state secrets or emergency rescue and disaster relief is not suitable for bidding.

2. It is necessary to use migrant workers to use poverty alleviation funds to implement work-for-poverty relief.

3. The main construction technology adopts specific patents or proprietary technologies.

4. The project built by the construction enterprise for its own use, and the qualification grade of the construction enterprise meets the engineering requirements.

5. 5. The original winning bidder still has the contracting ability for the additional minor affiliated projects or main sandwich projects under construction.

6. Other circumstances stipulated by laws and administrative regulations.