inquiry purchase refers to obtaining quotations and related information by asking multiple suppliers before purchasing goods or services, so as to make the best purchase decision. The following are three conditions for inquiry purchase: 1. Multiple suppliers: The first condition for inquiry purchase is to contact and communicate with multiple suppliers. Through dialogue with different suppliers, we can get multiple quotations and product information, so as to compare the prices, quality and services of different suppliers and choose the most suitable supplier. 2. Transparent demand: Before purchasing by inquiry, it is necessary to clearly and specifically express the purchasing demand and requirements. This includes specifying the specifications, quantity, quality standards and delivery date of the goods or services. Exact demand can make suppliers understand the requirements of buyers and provide accurate quotations and information. 3. Fair evaluation: The last condition is a fair evaluation. After receiving the quotations from suppliers, the purchaser needs to carefully evaluate the quotations from various suppliers and other relevant factors. In order to make a comprehensive and reasonable decision, we should consider the price, quality, delivery date, supplier's reputation and after-sales service.