Core Viewpoint - The article highlights the historical significance of a national secondary cultural relic, a stone mill, located in the Military Park of Liuzhou, Guangxi, which symbolizes the efforts of the local population during the wartime to support the construction of an airport for the "Flying Tigers" [2]. Group 1 - The stone mill weighs several tons and serves as a key witness to the contributions made by the local community during the anti-Japanese war [2]. - During a time of material scarcity in Liuzhou, the local populace worked in groups, using ropes to collectively push the stone mill to flatten the airport runway, ensuring the safe takeoff and landing of aircraft [2]. - After the aircraft took off, the community would quickly use the stone mill again to re-level the runway for subsequent flights, demonstrating their commitment to maintaining operational safety [2].

Core Viewpoint - The article highlights the life and experiences of Donald Kerr, a pilot and photographer who served in the U.S. military during World War II, emphasizing his contributions to aerial reconnaissance and his curiosity about Chinese culture during his time in China [1]. Group 1: Background and Early Life - Donald Kerr was born in 1914 and had a passion for airplanes and photography from a young age [1]. - He combined his interests to start a small business focused on aerial photography [1]. Group 2: Military Service - In 1941, Donald was drafted into the military due to his skills as a pilot and photographer [1]. - He became a pilot in 1942 after completing the necessary training [1]. - In October 1943, he arrived at the Flying Tigers base in Guilin, China, where he was part of a mixed U.S.-China squadron [1]. Group 3: Contributions and Cultural Engagement - At the Guilin base, Donald was responsible for escort missions, flying combat aircraft to protect bombers and conducting aerial reconnaissance [1]. - Unlike many of his peers, Donald was curious about Chinese culture and often ventured into the local community to explore [1]. - His experiences in Guilin, including learning about local customs and language, proved beneficial during his later escape in Hong Kong [1].