You can add 3 drops of single essential oil rose to 5 ml of base oil olive oil. It is recommended to add 10 ml of compound essential oil for facial conditioning. Mix it after use. It is recommended to use the compound essential oil within six months. Finally, in order to extend the shelf life, you can use a little wheat germ base oil, which is antioxidant and extends the shelf life. Just put the prepared compound essential oil in a cool place. It can be used alone or with facial cream. Just add 3-5 drops to the facial cream and mix it with massage. OK.