Inquiry (inquiry) is also called price inquiry, which means that one party of the transaction is preparing to buy or sell a certain commodity and asks the other party about the relevant transaction conditions of the commodity. (Such as the quality, specifications, price, shipment, etc. of the commodity). Inquiry is essentially an invitation to the other party to make an offer (invitation of offers), which is an invitation to offer in commercial law.

Inquiries are generally divided into two types: general inquiry: only asking for prices, requesting product catalogs or samples, and specific inquiry: asking for various transaction conditions of specific commodities.