They protect themselves
Water purifier
--Using hollow fiber cartridge, the cartridge material is a PAN alloy ultrafiltration membrane + KDF ultrafiltration principle, effective removal of bacteria in the water, residual chlorine, Heavy metals, scale (calcium and magnesium), volatile substances, rust, sediment and other harmful substances ......
--Ordinary water purifiers to the beneficial components of the water (such as minerals) are also filtered out, Walter water purifier using hollow fiber filtration of bacteria, heavy metals, chlorine ions and other harmful components. Heavy metals, chlorine ions and other harmful components, while retaining the minerals in the water to protect your health.