Core Viewpoint - The article discusses three highly-rated skincare products that effectively brighten and reduce dullness, particularly for those with yellow undertones, emphasizing their unique ingredients and benefits [1][2][10]. Group 1: Product Summaries - **谷雨光感水 (Gu Yu Brightening Water)**: This product is highlighted as a domestic hero for brightening and repairing skin, featuring the proprietary ingredient "极光甘草" which inhibits melanin production with a 72-hour suppression rate of 86.62% [1][2]. It also includes a five-fold antioxidant matrix to combat dullness and improve skin texture [1]. - **资生堂红腰子精华 (Shiseido Red Bottle Essence)**: Known for its lightweight texture, this essence helps stabilize skin affected by external stimuli and irregular routines, making it suitable for sensitive and problematic skin [6][8]. It promotes a natural glow by enhancing skin's health over time [7]. - **雅诗兰黛微精华原生液 (Estée Lauder Micro Essence)**: This product acts as a "absorption booster," enhancing hydration and preparing the skin for subsequent skincare steps [10][11]. It improves skin texture and balances moisture levels, making it a staple for those with dry or oily skin [10][11]. Group 2: User Experience and Results - **谷雨光感水**: Users reported noticeable improvements in skin texture and makeup application within the first week, with significant reduction in dullness by the second week [2]. By the third week, users experienced compliments on their skin's brightness [2]. - **资生堂红腰子精华**: The essence is praised for its ability to soothe and stabilize sensitive skin, leading to a healthier and more radiant complexion over time [7][8]. - **雅诗兰黛微精华原生液**: Users noted that this essence significantly improved skin hydration and texture, making it easier for other products to absorb effectively [11]. Long-term use resulted in a more balanced and refined skin appearance [11].

Core Viewpoint - The article discusses effective skincare products for brightening dull skin and reducing yellow undertones, highlighting three popular products that have shown positive results in improving skin tone and texture. Group 1: Product Analysis - **Gu Yu Light Water**: This product is noted for its ability to inhibit melanin production at the source, with a reported 72-hour melanin inhibition rate of 86.62% and an inhibition efficiency of 115.54% [1]. - **Shiseido Red Bottle Essence**: Described as a "stabilizing agent" for the skin, it helps soothe various skin issues and promotes a healthy glow, making it suitable for sensitive and problematic skin [10][12]. - **Estée Lauder Micro Essence**: This product acts as a "absorption booster," enhancing the effectiveness of subsequent skincare steps and providing hydration and repair [15][16]. Group 2: User Experience - **First Week**: Users report improved makeup adherence and enhanced skin texture [5]. - **Second Week**: Noticeable reduction in dullness, with users feeling confident to go makeup-free [6]. - **Third Week**: Friends remark on the user's improved complexion, indicating significant visible results [6]. Group 3: Special Promotions - **Gu Yu x Putuo Mountain Collaboration**: A special gift box for the Qixi Festival, combining Gu Yu Light Water with other skincare products to create a comprehensive skincare routine [6][7]. Group 4: Target Audience - The products are particularly recommended for individuals with yellow undertones, those who experience dullness due to lifestyle factors such as late nights and high caffeine intake [4][17].