All right. According to the information query of official website, the spot removing of Four Seasons Kangyan is developed by the Military Medical University, combined with the beautiful jade prescription recorded in ancient books such as Physician's Heart Governor, Dietotherapy Materia Medica, Taiping in Song Dynasty and Compendium of Ming Materia Medica. After repeated practice and verification, scientific data and experience have been summarized, so it is good to remove spots in the four seasons.