1. Bidding is an orderly way of market competition. The buyer, that is, the bidder, prepares the tender documents and issues the tender announcement. Suppliers, that is, bidders, purchase the bidding documents and prepare and submit the bidding documents according to the bidding requirements.

2. Bidding is the process of compiling and submitting bidding documents.

3. Bidding: Several bidders compete for the procurement contract (that is, the subject matter of bidding), including bidding and clarification in the bidding process, which is basically the same as the concept of bidding, but adds the meaning of competition.