It's only over 2000 yuan! The water purifier mainly depends on its filtration accuracy. Don't you buy a water purifier just to drink it yourself? Mainly depends on its filter element. 1. It's pp cotton. 2. It is granular carbon made of Malaysian coconut shell carbon. This is compressed carbon. This is Dow reverse osmosis membrane imported from America. Its filtration accuracy is 0.000 1 micron. 4. There is also charcoal to improve the taste of water. These are the basic filter elements of the water purifier. I hope it helps you!