On August 8th 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 stubborn resistance of the Chinese. A new attack on August 11th supported by tanks and aircraft took Nankou Station after which Gen. Suzuki's brigade advanced on Juyong Pass.
That same day, Chiang Kai-shek ordered the activation of the 14th Army Group (10th, 83rd and 85th Divisions) under Gen. Wei Li-huang. Coming by rail from Yingchia-chuang to Yi Hsien, elements of it were sent on a ten day march through the plains west of Peiking in a turning movement in support of Tang Enbo's forces. The Chinese 1st Army made attacks on the Japanese forces in Lianghsiang and Chaili to distract them and sent a detachment to Heilung Pass to cover the advance of 14th Army Group. From the dates on a Japanese map of the battle these forces did not reach the area until September when it was too late and clashed with the Japanese forces from the 9th to the 17th to no avail.
On August 12th, Tang Enbo's army counterattacked surrounding the Japanese cutting them off from their supplies and communications. On Aug 14th, Itagaki Seishiro's 5th Division was sent to the relief of the 11th Independent Mixed Brigade at Juyongguan.
On August 16th, Itagaki arrived at Nankou and began an enveloping attack on the right flank of 13th Corps making a five pronged attack at Huanglaoyuan. 7th Brigade of 4th Division under Shih Chueh was moved to block this move and reinforcements of Li Hsien-chou's 21st Division and Chu Huai-ping's 94th Division were brought up, engaging in days of heavy fighting. On August 17th General Yan Xishan, Director of the Taiyuan Pacification Headquarters, directed 7th Army under Fu Zuoyi to move its 72nd Division and three brigades by rail from Tatung to Huailai to reinforce Gen. Tang Enbo's forces.