In 1943, in the southern Shandong region, Chen Tianfang, commander of the Lunan Independent Brigade of the Eighth Route Army, led his troops to block the Japanese army. Chief of Staff Lü Chong sent an urgent telegram to mobilize the Canglang Commando where Qin Feng was, to Ganyu in the northernmost part of Jiangsu to rescue Wang Hua, a comrade of our party who was imprisoned by the Japanese army. During the rescue process, Wang Hua was attacked and sacrificed, and Ouyang Bing's identity as a Communist was exposed and he left the military command action team. Through the codeword left by Wang Hua on Ouyang Bing before his death, Ouyang Bing learned that the location of tungsten sand was west of Shijiagou. The Canglang Commando rushed to Jixiang Village, where the Japanese army was also looking for tungsten sand. The Canglang Commando and others blocked the Japanese army, withstood the Japanese offensive, and successfully transferred the tungsten sand.