He Zhuguo
In the autumn of 1929, Zhang Xueliang sent He Zhuguo and others to visit Qiucao with the Nanjing National Government delegation. He Zhuguo was also instructed to test the attitude of the Japanese government towards Northeast China. In Japan, when He Zhuguo held talks with the Japanese Chief of Staff, the Secretary of the Army, and officials of the Ministry of Foreign Affairs, the Japanese side made a territorial claim to Northeast China, demands He Zhuguo rejected on the spot.