Nongfu Spring is not mineral water or pure water, but a kind of natural water. This kind of water is natural weak alkaline water (pH 7.3±0.5), which is made of groundwater as raw water and filtered and sterilized at high temperature. It contains natural mineral elements such as potassium, sodium, calcium and magnesium. Nongfu Spring passed the International Organization for Standardization (ISO) test and obtained the royal certification, becoming the first natural water in China to pass the royal certification.