Core Points - The end of the "Sanfu" period this year is marked as a "short Sanfu," concluding 30 days earlier than the previous years, with an early end by 5 days compared to last year, 1 day compared to the year before, and 6 days compared to the year before that [1] - The "Sanfu" period consists of three phases: the initial phase, the middle phase, and the final phase, with the initial and final phases fixed at 10 days each, while the middle phase can vary between 10 to 20 days [1] - The determination of the duration of "Sanfu" is based on the ancient Chinese calendar system, specifically the "Geng" days following the summer solstice and the first "Geng" day after the beginning of autumn [1][3] - The current "Sanfu" period breaks a 10-year streak of 40-day durations from 2015 to 2024, initiating a new cycle of alternating 30 and 40-day durations from 2025 to 2036 [3] - Weather conditions post "Sanfu" are characterized by a gradual temperature decline, but the "autumn tiger" phenomenon may still persist, indicating a slow transition from summer heat [5]

Core Insights - The article discusses the extreme high temperatures and humidity experienced in China during the current summer season, particularly during the "Sanfu" period, which includes the initial, middle, and final phases of high heat [1][3]. Temperature Trends - The middle phase of "Sanfu," from July 30 to August 8, saw significant temperature increases across most of China, with regions like eastern Sichuan, western Chongqing, and southern Shaanxi experiencing average temperatures over 4°C higher than the historical norm [3]. - As of August 7, 94 national meteorological stations in areas such as Sichuan, Chongqing, and Henan have broken local records for the highest temperatures in August, with Chongqing recording a peak of 44.2°C on August 4 [3]. Drought Conditions - Due to the combination of high temperatures and low rainfall, regions including Shaanxi, Henan, Sichuan, and Chongqing are facing severe meteorological drought conditions [5]. Future Weather Predictions - As the "Sanfu" period progresses, the subtropical high pressure is expected to shift southward, leading to increased cold air and rainfall in northern regions, which will significantly reduce high temperatures [5]. - However, southern areas, particularly the Sichuan Basin and Jiangnan, are predicted to continue experiencing extensive high temperatures, with some regions facing 5 to 8 consecutive days of extreme heat [5]. Public Advisory - Meteorological experts advise the public to avoid outdoor activities during peak heat hours and to manage indoor temperatures to prevent discomfort due to temperature fluctuations [5].

暑期与三伏天的相遇，藏着孩子们成长的"黄金密码"。悠长假期让运动与作息安排更轻松，炎热天 气能加快人体新陈代谢，助力孩子营养吸收与生长激素分泌。具体应该如何做？快来听听专家怎么说！ 本期指导专家：中国中医科学院西苑医院儿科副主任医师黄静 策划/剪辑：袁丝语、陈子源 ...

Core Viewpoint - The article discusses the benefits of sunbathing on the back during the "Sanfu" period, emphasizing its role in traditional Chinese medicine for enhancing health and wellness. Group 1: Benefits of Sunbathing on the Back - Sunbathing is a traditional Chinese medicine method that stimulates meridians and acupoints, helping to replenish Yang energy and boost immunity [2] - The back is a key area for the bladder meridian and the governing vessel, which are crucial for regulating Qi and blood balance [2] - Benefits include: - Moisture removal and weight loss by enhancing the spleen's function [4] - Increased metabolism through improved blood circulation [4] - Blood and Qi regulation, leading to better overall vitality [5] - Cold and Yang replenishment, particularly for those with cold and damp conditions [6] Group 2: Precautions for Specific Groups - Not everyone is suitable for sunbathing; three groups should be cautious: - Individuals with weak constitutions, elderly, or those prone to skin allergies [9] - People with excessive Yang energy or Yin deficiency, who may experience discomfort after sunbathing [9] - Patients with underlying health conditions such as hypertension, coronary heart disease, or hyperlipidemia [10] Group 3: Guidelines for Effective Sunbathing - Important details for effective sunbathing include: - Choosing appropriate weather and time, avoiding prolonged exposure during peak sun hours [11] - Starting with 5-10 minutes and gradually increasing to 15-30 minutes, 2-3 times a week [13] - Avoiding immediate cold showers or air conditioning after sunbathing, allowing the body to adjust [15] - Staying hydrated with warm water or light saltwater, avoiding cold drinks [15] Group 4: Tips for Office Workers - Office workers can utilize their lunch breaks or afternoon time to sunbathe indoors by sitting with their backs to a window [17] - Specific areas like the waist or the area near the "Dazhui" acupoint can be targeted for health benefits [17]

Group 1 - The concept of "Sanfu Tian" is associated with the peak of Yang energy in nature, making it an ideal time for health practices like "sunbathing the back" to enhance Yang energy and dispel internal cold [1][3] - "Sanfu Tian" is recognized as a prime period for eliminating dampness, with traditional Chinese medicine suggesting that summer heat and increased sweating can lead to more exposure to wind and cold, necessitating special attention to dampness removal [1][3] - The practice of "natural moxibustion" through sunbathing the back has gained popularity, as it utilizes sunlight instead of burning moxa, being referred to as "free moxibustion" [1] Group 2 - Experts indicate that sunbathing the back is particularly beneficial for individuals with cold and damp constitutions, characterized by symptoms such as cold intolerance, cold extremities, and chronic fatigue [3] - Certain populations are advised against sunbathing the back, including those with skin conditions like lupus or psoriasis, children under 14, pregnant women, and individuals with hypertension, hyperlipidemia, or diabetes [3][4] - Precautions are necessary during sunbathing, such as avoiding sunburn, selecting appropriate times for exposure, and limiting sessions to no more than 30 minutes to prevent dehydration [4]

Group 1 - The official start of the hottest period in China, known as "Sanfu," has begun, lasting for 30 days this year, breaking the recent trend of 40-day durations [1] - The duration of "Sanfu" is determined by the timing of the "Geng" day, with no direct correlation to temperature levels [1] - Southern cities, particularly Chongqing and Hangzhou, typically experience the highest number of hot days during "Sanfu" [2] Group 2 - Typhoon "Wipha" has intensified and is expected to make landfall in Guangdong, with wind speeds reaching 38-42 meters per second [4] - Despite the typhoon's strength, it is not expected to have a direct impact on Hangzhou, which may benefit from increased moisture leading to localized rain and even rainbows [4] - Following "Wipha," Typhoon "Fengsgao" is anticipated to follow, indicating an active period for tropical systems [5]

Group 1 - The article discusses the phenomenon of "Sanfu days" being the hottest period of the year, with significant temperature increases due to the imbalance between heat absorption and heat dissipation on the ground [1][2] - It highlights the trend of earlier high temperatures in China, with the first high-temperature day occurring earlier in most regions from 1991 to 2020 compared to 1961 to 1990 [2] - The article notes that the number of high-temperature days has generally increased over the past 60 years, with an average increase of 6.7 days every decade in annual warm days [2] Group 2 - The extreme high temperatures are linked to the Western Pacific subtropical high-pressure system, which has been controlling the weather in the central and eastern regions of China [2] - The article emphasizes the health risks associated with extreme heat, urging the public to take precautions and limit outdoor activities during high-temperature periods [2]

Core Points - This year's "Sanfu" period is shorter, lasting only 30 days, but its intensity remains high [1][4] - The "Sanfu" consists of three phases: initial, middle, and final, with specific start dates based on the lunar calendar [3][4] - The initial phase starts on July 20, the middle phase on July 30, and the final phase on August 9, all lasting 10 days each [4] Summary by Sections - **Duration and Intensity** - The "Sanfu" period this year is only 30 days long, yet it is expected to be impactful, with high-temperature warnings already in effect since June [1][4] - **Phases of "Sanfu"** - The "Sanfu" is divided into three segments: - Initial phase: July 20 to July 29 - Middle phase: July 30 to August 8 - Final phase: August 9 to August 18 [3][4] - **Health Recommendations** - Suggested practices include consuming warm meals, engaging in morning exercises, and maintaining a comfortable indoor environment [4][5] - Avoiding sudden temperature changes, consuming cold foods directly from refrigeration, and ensuring proper sleep hygiene are also recommended [5]

Core Viewpoint - The article discusses the characteristics and implications of this year's "Sanfu" period, which lasts for 30 days, highlighting the importance of proper summer cooling methods to cope with the heat [1][9]. Summary by Sections Sanfu Duration and Structure - This year's Sanfu period is shorter, lasting only 30 days, from July 20 to August 18, divided into three phases: initial Fu (July 20-29), middle Fu (July 30-August 8), and final Fu (August 9-18) [7]. - The number of days in the middle Fu is limited to 10 due to only four "Geng" days between the summer solstice and the beginning of autumn [7]. Weather Implications - The phenomenon of "autumn wrapping summer" is noted, where the residual heat continues to be felt after the start of autumn, aligning with the saying "hot enough to cry" [9]. Cooling Methods - The article provides recommendations for coping with the heat during Sanfu, categorized into "three do's and three don'ts" [10]. Recommended Practices - **Dietary Suggestions**: Consuming warm, soft foods like hot porridge or soup, and incorporating hydrating vegetables such as steamed winter melon and loofah [12][13]. - **Exercise**: Engaging in light exercise in the early morning to promote sweat gland function and prevent skin issues [15]. - **Cooling Environment**: Setting air conditioning to 26-27°C and using low-speed fans for a more natural cooling effect [17]. Practices to Avoid - **Temperature Shock**: Avoiding sudden exposure to cold air from air conditioning after being outdoors to prevent headaches and other ailments [19]. - **Sleeping with Wet Hair**: Ensuring hair is dry before sleeping to prevent discomfort and fatigue the next day [21]. - **Overheating Skin**: Not using heavy sunscreen while exercising to prevent clogged pores and overheating [23].

Group 1 - The "Sanfu" period this year lasts for 30 days, from July 20 to August 18, which is the shortest in the last decade [3][6] - The "Sanfu" is divided into three parts: the initial phase (July 20-29), the middle phase (July 30-August 8), and the final phase (August 9-18) [3][4] - The duration of "Sanfu" can vary between 30 and 40 days depending on the number of "Geng" days between the summer solstice and the beginning of autumn [4][6] Group 2 - Historically, from 1951 to 2050, there are 71 years with a 40-day "Sanfu" and 29 years with a 30-day duration [6] - The "Sanfu" period is characterized by high temperatures and humidity, often referred to as "muggy heat" [7][9] - The "Sanfu" period typically includes the hottest solar terms of the year, such as "Minor Heat," "Major Heat," and "Beginning of Autumn" [9]