After the "September 18th Incident," the northeastern region of China fell under siege, and the Japanese Kwantung Army began a large-scale crackdown on anti-Japanese armed forces. The Japanese forces stationed in Dunhua, under the command of Miyamoto's regiment, captured Wan Maosen, the president of the Dunhua Chamber of Commerce who was actively raising funds for the Anti-Japanese Armed Forces, and forced him to surrender the 200,000 silver dollars he had collected. Wan Maosen remained unyielding to death, and unfortunately, the Japanese troops executed him along with thirteen other patriotic individuals who had actively participated in the fundraising.Both the Japanese army and the Anti-Japanese Armed Forces were actively searching for the whereabouts of the 200,000 silver dollars. Not long after, Miyamoto received a mission to transport supplies to the Amano Brigade, which was conducting a crackdown on anti-Japanese armed forces in the Mudanjiang area. Miyamoto ordered Captain Ueda to escort the supplies. Li Yanlu, the chief of staff and commander of the supplementary regiment of the Anti-Japanese Armed Forces, who was also a Communist Party member, volunteered for the task after receiving news that the Japanese supply troops would pass through that route. The commander of the Anti-Japanese Armed Forces, Wang Deling, convened a meeting with his deputy KONG Zhaorong, Li Yanlu, Meng Guangbin (the chief of staff of the supplementary regiment and a Communist Party member), and Zhang Litao (the captain of the main battalion who would later become the deputy commander of the supplementary regiment) to confirm the current tasks: raising military funds, incorporating bandits, and looking for opportunities to strike against the Japanese invaders.Zhang Litao ventured alone into Tianlong Mountain. To persuade the bandit leader Long Jianghai to join the Anti-Japanese Armed Forces, Zhang...