Known as Large Volume Parenteral (LVP), which usually refers to liquid sterilization preparations with a volume greater than or equal to 50ml and directly injected into the body by intravenous drip, the packaging forms include glass bottle, plastic bottle, non-PVC soft bag and vertical soft bag and other packaging forms; large infusion, tablets, liquid injections, powder injections and capsules are collectively referred to five important preparations in the global pharmaceutical industry. According to its clinical use, large infusions can be divided into fluid balance infusions, antibiotics infusions, nutritional infusions and other therapeutic infusions. They are mainly used to supplement body fluid, electrolytes and nutrition, and can be used as plasma substitutes to maintain blood pressure;