SOTOwasfoundedinBeijingin1998bytwoscientists:adoctorinclinicalmedicineandamasterinphysics.Withtheirknowledgeinmedicineandscience,theyledateamofyoungpeopleanddedicatedthemselvesintodevelopinghighqualitymedical-gradeairpurificationsystems.Afteryearsofcontinuousresearchandtesting,SOTOhasbecometheleadingmanufacturerinmedicalairpurificationsystems.