Ling Ke. Koleen water purifier is an earlier brand, probably 1999, when I was working on a project. KOLEEN is one of the well-known water purifier brands and often competes for business together. His water purifier is very professional, such as excellent manganese removal from groundwater, seawater desalination equipment and military marine water supply equipment. NBR used for ultrafiltration sewage treatment is also very good, and it is the strength of engineering equipment, and some equipment exports are quite large. In recent years, the brand has applied for a Chinese trademark: Ling Ke. This Ling Ke-branded product focuses on household water purification, and I heard that it is also doing well.