Core Viewpoint - The letters known as "Qiaobi" sent by overseas Chinese during the Anti-Japanese War serve as valuable historical documents, reflecting their deep concern for their homeland and their active participation in supporting the war effort [3][4][5]. Group 1: Historical Context - The letters highlight the emotional connection and responsibilities of overseas Chinese, particularly from Jiangmen, towards their families and homeland during the turbulent times of the Anti-Japanese War [3][9]. - Jiangmen is recognized as a significant overseas Chinese hometown, with its diaspora spanning 145 countries and regions, showcasing the global reach and influence of Jiangmen's expatriates [3][4]. Group 2: Personal Stories and Contributions - The letters express personal struggles and the unwavering hope for victory against Japanese aggression, as seen in the correspondence from Chen Qin and Wu Jinlan, who conveyed their concerns and support for their families back home [4][7]. - Many overseas Chinese, like Wu Jinlan, actively engaged in wartime work and expressed a willingness to sacrifice for their country, demonstrating a strong sense of patriotism and duty [7][9]. Group 3: Financial Support and Solidarity - The financial contributions from overseas Chinese, such as the donations listed by the Yu family, played a crucial role in supporting their families and communities during the war, reflecting a collective effort to alleviate the hardships caused by the conflict [11][12]. - The letters also reveal the economic challenges faced by families in China due to rising prices and scarcity of resources, prompting overseas Chinese to increase their remittances to support their loved ones [11][17]. Group 4: Cultural and Emotional Significance - The "Qiaobi" letters encapsulate the emotional weight of separation and the enduring bond between overseas Chinese and their homeland, serving as a testament to their shared identity and commitment to national revival [5][10]. - The letters are not only personal communications but also historical artifacts that document the broader narrative of the Chinese people's struggle during the war, emphasizing the importance of remembering and honoring these contributions [14][17].