1, government websites: national government procurement network and local government procurement network, and the answer information is authoritative.
2. Bidding for public * * * resource trading center and public * * * service platform: there are more information than government websites, and the authority is not enough for government websites.
3. Corporate website: Generally, large state-owned enterprises have their own recruitment platforms, which are provided for suppliers, so it is difficult for new foreign suppliers to enter.
4. Aggregation websites: For example, construction and communication websites are usually characterized by comprehensive information, convenience and quickness, so they are loved by the majority of bidders.