A newly formed supplementary regiment of the Eighth Route Army was ordered to enter the Hebei border area at the eastern foot of the Taihang Mountains and the western part of Hebei to rebuild the anti-Japanese base areas behind the enemy lines. It fought a life-and-death confrontation with an enemy with advanced weapons, well-equipped and well-equipped ammunition. During several years of fighting, the Japanese army Some officers and soldiers clearly realized that Japan must be defeated and China must win.