What is surprising is that the 8th Army's air force seemed to have lost its aggressive spirit at the beginning of the war, the Baicheng defense line was in danger, but they never helped, they only sent a number of Li-2 armed transport aircraft to drop bombs and bombs. The Japanese army, who had suffered enough from the Red Air Force, decided that the Red Air Force had exhausted its ammunition and could not advance again, this unprecedented good news prompted their spirit and made their attack more frenzied. To destroy the long-range artillery barrage that had caused so many casualties, the Japanese army sent a brigade to climb mountains and wade streams around the defense line to sneak behind the 139th Infantry Division, following the sound. Dong has found this battlefield. of artillery. It's just that this position is not easy to chew, charged barbed wire has been pulled, mines have been laid, many layers of anti-aircraft machine guns have been placed, the brigade is invisible. ,So what is the 9th Independent Mixed Brigade doing now?