Public bidding is the main procurement method of government procurement, which refers to a procurement method in which the purchaser invites all potential unspecified suppliers to participate in bidding by issuing a tender announcement according to legal procedures, and the purchaser selects the winning supplier from all bidding suppliers through some predetermined criteria and signs a government procurement contract with them.

seek tenders

Invited bidding, also known as selective bidding, is a procurement method in which the purchaser selects a certain number of legal persons or other organizations (not less than three) according to the credit standing and performance of suppliers or contractors, sends them invitations to bid, and invites them to participate in bidding competition, so as to select the winning supplier.

negotiated tender

Agreement bidding is a non-competitive bidding method and a way to select contractors through negotiation.

Comprehensive bidding

Comprehensive bidding is a kind of bidding method which combines open bidding and invitation bidding. Firstly, a group of suitable contractors are selected through public bidding, and then the final suppliers are determined through invitation bidding.