Group 1 - The article discusses the social aspect of travel, emphasizing that the author prefers to travel for social gatherings rather than for the sake of tourism itself [1] - The author has recently joined a travel group to explore the northwest region, highlighting the importance of seizing travel opportunities before becoming too busy with work [2] - The primary audience for the travel group consists of teachers, indicating a demographic trend in travel preferences [4] Group 2 - The travel group included mostly older individuals, with the author noting the age dynamics and the benefits of age-related discounts [5] - The author contrasts the vitality of older travelers with their own fatigue, suggesting a generational difference in energy levels during travel [6] - The travel experience included a mix of regional cuisines, reflecting the diverse culinary landscape of the area visited [6] Group 3 - The author expresses a preference for natural landscapes over cultural sites, with specific mentions of favorite locations such as Qinghai Lake and Chaka Salt Lake [8] - The article critiques the tourism infrastructure in Qinghai compared to Yunnan, indicating potential areas for improvement in the local tourism industry [8] - A notable observation is the prevalence of traditional smoking among older travelers, which adds a cultural layer to the travel experience [11]