What are the common bidding methods?

1, open bidding, also known as unlimited bidding, means that the tenderer invites unspecified legal persons or other organizations to bid in the form of tender announcement. There are not less than three bidders for public bidding, otherwise it will lose its competitive significance.

2. Invited bidding, also known as limited competitive bidding, means that the tenderer invites a specific legal person or other organization to bid in the form of an invitation to bid. Invite not less than 3 bidders to bid.

3. In China, there is also a relatively extensive bidding method in the construction field, which is called "bidding negotiation", which is a way for the employer and the contractor to finally achieve their goals through one-on-one negotiation.