When selecting products for bidding, you should choose products with formal registration certificates for bidding.
Submission of Tender (Submission of Tender) refers to the tenderer (seller) should be invited by the bidder, according to the tender notice or the conditions set out in the bidding order, within the specified period, to the bidder to deliver the behavior. At present, most national government agencies and public utilities purchase equipment, materials, daily necessities, etc. through tendering. In the resource exploration, development of mineral deposits or investment in the construction of engineering projects, but also often use bidding.