Following the loss of Beiping, Tang Enbo's 13th Army (4th and 89th Divisions) took up positions in depth along the Peking–Suiyuan Railway at Nankou, and further to the rear at Juyongguan (Juyong Pass).

Zhao Chengshou's 1st Cavalry Army, Liu Ruming's 143rd Division, and two Peace Preservation Brigades began an attack on the Mongol forces in northern Chahar.

On August 8, the Japanese 11th Independent Mixed Brigade, commanded by Gen. Shigiyasu Suzuki, began their attack on the left flank of the 13th Corps position at Nankou, but were thwarted after three days by the difficult terrain and the stubborn resistance of the Chinese.

A new attack on August 11, supported by tanks and aircraft, took Nankou Station, after which Gen. Suzuki's brigade advanced on Juyong Pass.

Coming by rail from Yingchia-chuang[clarification needed] to Yi County, elements of the 14th Group Army were sent on a ten-day march through the plains west of Beiping in a flanking movement in support of Tang Enbo's forces.

On August 17 General Yan Xishan, Director of the Taiyuan Pacification Headquarters, directed the 7th Group Army, under Fu Zuoyi, to move its 72nd Division and three brigades by rail from Datong to Huailai to reinforce Tang Enbo's forces.

From August 18–19, the Chahar Expeditionary Force counterattacked from Zhangbei, and took Shenweitaiko[clarification needed] on the Great Wall and the Hanno Dam.

On August 20 Gen. Fu Zuoyi's 7th Group Army diverted its 200th and 211th Brigades, which had been moving south by rail to join Gen. Tang Enbo's forces, back to defend Kalgan.

According to Hsu Long-hsuen this unit moved south from Tushihkou[clarification needed], and on August 30 attacked Yenching via Chihcheng, but was repulsed by the Chinese 17th Army.

Demchugdongrub was rewarded for his collaboration with the highest position in this new Japanese puppet state, the Mongol United Autonomous Government.