2+4+3 gold sunscreen system. According to the personal database, Sun Protection III refers to "2+4+3 gold sun protection system", which belongs to the sun protection standard. "2" refers to the use of basic skin care products with SPF value between 15-30, such as emulsion and essence; "4" refers to the use of sunscreen, which can improve the sunscreen index and enhance the sunscreen effect; "3" refers to extra protective measures, such as wearing a hat and sunglasses to avoid exposure to the sun.