Mountain spring water is natural water formed through self-purification of the mountain. The water source may come from rain, snow or mountain lakes. As the water flows, some mineral components that are beneficial to the human body are dissolved, but the mineral content is not as strict as that of natural mineral water. At the same time, because the water body is exposed on the surface, it is susceptible to external pollution; mineral water naturally gushes from deep underground. It is an unpolluted underground mineral spring that is or has been artificially exposed; it is rich in mineral essence, trace elements or carbon dioxide gas; under normal circumstances, its chemical composition, flow rate, water temperature and other dynamics are relatively stable within the natural fluctuation range. Mineral water is formed by circulation deep in the formation, which can prevent external pollution. It contains natural minerals and limited indicators specified by national standards, and must comply with the national GB8537 standard. Mineral water is currently recognized as healthy and safe drinking water. What is mineral water? Mineral water is generally made from city tap water, which is purified, artificially added with minerals, and filled after sterilization. At present, the types of mineral water added are relatively confusing, and are mainly added by the industry in accordance with the provisions and limits of the "Hygienic Standards for the Use of Food Additives" (GB2760-2007). There is no unified national standard. Mineral water is generally acidic. What is purified water? Pure water, from an academic point of view, is high-purity water, which is water with extremely high chemical purity. It is mainly used in biology, chemistry, metallurgy, aerospace, electricity and other fields, and has very high requirements for water purity. For example, pure water used in power systems is required to have low impurity content reaching the "microgram/liter" level. Purified water is made from water that meets the sanitary standards for drinking water as raw water, and is produced through electrodialyzer method, ion exchanger method, reverse osmosis method, distillation method and other appropriate processing methods. It is sealed in a container and is not Contains no additives, colorless and transparent, can be drank directly. However, due to the high degree of filtration, purified water not only filters out impurities and microorganisms, but also filters out minerals and nutrients. Like mineral water, purified water also changes the water from alkaline to acidic during purification and filtration.