Group 1 - The core concept of sunscreen is to protect against ultraviolet (UV) rays, specifically UVA and UVB, with UVB being the primary cause of skin damage [2][3] - Sunscreen is necessary year-round, not just in summer, as UV rays can still be harmful during cloudy days or in indoor environments where UVA can penetrate glass [3][4] - There are two main types of sunscreen: physical (using barriers like hats and clothing) and chemical (using creams and sprays to absorb UV rays) [4][5] Group 2 - It is recommended to combine both physical and chemical sunscreen methods for optimal protection, as each has its advantages and disadvantages [5] - All demographics, including children, need to be mindful of sun protection, with specific recommendations for infants and young children to primarily use physical methods [5][10] - The SPF (Sun Protection Factor) and PA (Protection Grade of UVA) ratings are crucial indicators of a sunscreen's effectiveness, with higher values indicating better protection [6][8] Group 3 - Different environments require different levels of sunscreen protection, with specific SPF and PA recommendations based on activity and exposure [9] - When selecting sunscreen for children, it is advised to choose products with SPF 30 or higher and PA++ or higher, considering their unique skin characteristics [9][10] - The use of sunscreen sprays for children is discouraged due to the risk of inhalation and potential health hazards [12][13] Group 4 - Consumers should be cautious when purchasing sunscreen products, ensuring they check for proper labeling, SPF and PA values, and ingredient suitability for their skin type [14][15] - Proper application techniques are essential for effective sun protection, including applying sufficient amounts and reapplying every two hours during outdoor activities [15] - Sunscreen should be removed at night to prevent skin irritation, with specific cleaning methods recommended for different types of sunscreen [17]

Core Viewpoint - The demand for sunscreen cosmetics is peaking as temperatures rise, but there are concerns about the effectiveness of products claiming to offer multiple benefits, leading to consumer skepticism about product authenticity and safety [1][2]. Group 1: Regulatory Compliance - Sunscreen products must have the "National Cosmetic Special Approval" (国妆特字) number to be legally sold in China, especially those claiming to have sun protection effects [3][4]. - In 2024, the National Medical Products Administration reported that out of 535 batches of cosmetics tested, 120 batches of sunscreen products were found to contain banned ingredients or did not meet regulatory requirements, making up over 22% of all tested cosmetics [2]. Group 2: Consumer Awareness - Consumers are advised to be cautious when selecting sunscreen products, as not all products claiming to have sun protection require the "National Cosmetic Special Approval" number, but those that do must have it if they claim to provide sun protection [4][8]. - Many consumers feel uncertain about how to accurately choose sunscreen products, often relying on sales recommendations without fully understanding product labels [4]. Group 3: Product Identification - Products that claim to have sun protection but lack the "National Cosmetic Special Approval" number or any SPF/PA value labeling are considered non-compliant and potentially misleading [3][7]. - Consumers can verify the legitimacy of sunscreen products by checking for the "National Cosmetic Special Approval" number on the label and using the official cosmetic regulation app to confirm product details [8].