Core Viewpoint - The article discusses the traditional Chinese herbal sachets, known as "xiang nang," which serve both as a fashionable accessory and a method of external treatment in traditional Chinese medicine, particularly for health protection during the summer months [1][2]. Group 1: Historical and Cultural Significance - The concept of herbal sachets dates back to ancient Chinese literature, with references found in works like "Li Sao" by Qu Yuan, highlighting the use of fragrant herbs as early forms of sachets [2]. - The popularity of sachets grew in the Ming and Qing dynasties, where they were used by both nobility and commoners, often crafted from luxurious materials or simple fabrics [2]. Group 2: Health Benefits and Ingredients - Modern research indicates that key ingredients in herbal sachets, such as mugwort (艾草) and calamus (菖蒲), can enhance immune function and repel insects, thus improving overall health [3]. - Mugwort is recognized for its insect-repelling properties and can also help improve indoor air quality, especially in humid conditions [3]. - Calamus is noted for its aromatic qualities and has been shown to possess anti-inflammatory and antibacterial properties, contributing to its effectiveness in repelling mosquitoes [3]. Group 3: Safety and Usage Considerations - While some ingredients like realgar (雄黄) have historical uses in repelling insects, they can be toxic if not processed correctly, necessitating caution and professional guidance for their use [4]. - Herbal sachets are not merely decorative; they serve practical purposes such as pest control and disease prevention, as reflected in the saying "carry a sachet, fear not the five pests" [5]. - It is advised that individuals with allergies, asthma, or other health conditions consult a healthcare provider before using herbal sachets [10].