1. Due to technical complexity or special requirements, there are fewer potential bidders to choose from.
2. Limited by the natural geographical environment
Three. Involving national security or state secrets
4. Laws, regulations and rules stipulate that the use of public bidding fees accounts for a large proportion of the total project amount, which is not suitable for bidding.
The program sends invitations to specific targets in this electronic data or written form. The bidder shall prepare the bidding documents according to this invitation. After the bidder responds to the bid, it shall pay the bid bond before the bid opening. The deadline depends on the bidding method and your own situation. That's about it.