Legal analysis: Volume-based procurement means that when the state purchases drugs collectively, it will announce the required purchase volume in the bidding announcement so that bidding companies can consider their own production capabilities.

Legal basis: "Notice of the National Medical Security Administration on Issuing the "Opinions on the Current Management of Drug Prices"" 1. Connect and improve the current drug price policy (2) Give play to the guiding role of medical insurance in drug prices . Deepen the reform of the centralized drug procurement system based on quantity, adhere to the direction of "volume-based procurement, linking quantity and price, and integrating recruitment and procurement" to bring drug prices back to a reasonable level. Explore and implement the formulation of medical insurance drug payment standards based on generic names and dynamically adjust them. Improve an open and transparent negotiation mechanism for access to the medical insurance drug catalog. Improve the management of agreements with designated institutions, strengthen price supervision and information disclosure of drugs paid by medical insurance funds, and positively guide the market price order.