The main sources of bidding information are:
1, the development planning department of the people's government at or above the county level.
2, construction, water conservancy, transportation, railway, civil aviation, information industry and other departments.
3, the planning department of the people's governments at or above the county level.
4. Land departments of the people's governments of provinces, municipalities directly under the Central Government and autonomous regions.
5, the financial department of the people's governments at or above the county level.
6, survey and design departments and engineering consulting units
7, the construction of trading center, information engineering trading center, government procurement department.
8. Other media designated by the government.
Bidders often collect the information of bidding projects from the websites of the above departments or other channels.