After Fa Zheng arrived at the Jingmen Mountain position. He handed over 100,000 Yizhou recruits to Zhang Ren, the marshal of the Eastern Route Army, and he took dozens of guards to disguise themselves as people in the mountains, secretly inspected the terrain and customs of the mountains and rivers in Yiling, Sheshan and Yidao, and then returned to Huya Mountain and put forward a new combat proposal to Zhang Ren.

To sum up Fazheng's strategy, it is the eight words of "concealing the truth and revealing the false, and sowing discord."

Now counting the 100,000 troops brought by Fa Zheng from Chengdu, the troops gathered near Huya Mountain by Zhang Ren have reached 180,000, which is not inferior to Liu Bei's army to attack Wu recorded in the history books. (Liu Bei claimed to have an army of 700,000 when he attacked Wu, but in fact it was less than 200,000.) Although Zhang's forces had an advantage from the beginning of the attack on Huya Mountain, there was no way to take Huang Zhong all the time, and the key was two points. First, Huya Mountain is not conducive to the deployment of the whole army, even if there are more troops, no more than 10,000 people can be engaged in battle each time; second, the fortifications on Huya Mountain were built by Huang Zhong like a huge hedgehog, so that the Yizhou army has a sense of grievance that has nowhere to speak, and I don't know where Huang Zhong learned these "bad-hearted" methods.

After Zhang Ren arrived at Jingmen Mountain, he did not think about bypassing Huya Mountain, leading a large army from the west bank of the Yangtze River to Yidao, and then first took Jiangling City, the seat of Nanjun Zhizhi. However, with the strength of the army at that time, if Zhang Ren attacked Yidao first, Huang Zhong would have sent troops from Huya Mountain to recapture Jingmen Mountain, and then cut off the supply of grain and grass for the Yizhou army, and also cut off the retreat of the Yizhou army. In this way, the Yizhou East Route Army will inevitably be demoralized and defeated without a fight. Even if the Eastern Route Army can barely hold on, if Liu Biao sends a force from Xiangyang to reinforce Jiangling, then what should the Yizhou Army do next?

It was precisely because of these considerations that after Zhang Ren arrived in Yiling, although he reorganized the two troops of Wu Yi and Jia Long, and commanded the army to take Jingmen Mountain from Huang Zhong again, it was difficult to make great achievements after that. It's not that Zhang Ren doesn't understand the art of war, it's just that the geographical location of Huya Mountain is too special and prominent, making it difficult to turn a blind eye.

The strategy proposed by Fa Zheng this time was to fully draw on Zhang Ren's previous experience in using troops against Huya Mountain, and added more content on the basis of a detour.

The purpose of concealing the truth and revealing the false is to replace the 80,000 veterans of Wu Yi and Jia Long who are experienced in combat in Jingmen Mountain, and let the 100,000 Yizhou new army replenish them, so as to create the false impression that the strength of Jingmen Mountain is still slowly increasing to Huang Zhong and Li Yan on the opposite side.

Of course, how to withdraw and increase troops from the Jingmen Mountain position is a very patient and meticulous technical task, and it cannot be replaced all at once, nor can it be too slow to delay the follow-up action of the army.

The 80,000 Yizhou elite troops who were evacuated first quietly withdrew westward to Sheshan, and then went down the river from Yishui in the south of Sheshan to attack Yidao. If Huang Zhong led his army to attack Jingmen Mountain, the army would turn around and pounce on Huya Mountain, separate Huang Zhong's troops from Li Yan, and then break them separately; if Huang Zhong did not move and Li Yan sent troops to save Yidao, he would just fall into the hands of Fa Zheng and directly eat Li Yan's men.

It turned out that Fa Zheng secretly analyzed the personalities of Huang Zhong and Li Yan, and he found that although Huang Zhong and Li Yan were both good generals, Li Yan liked dictatorship. At the beginning, Huang Zhong was still under Li Yan, but now he has become the general of the Duzhen side, and because he guarded Yiling, his prestige and status in Jingzhou are even higher than Li Yan. This time, Huang Zhong and Li Yan worked together to defend Yiling, but Huang Zhong was the main player, and Li Yan was the auxiliary, so Li Yan would really be convinced?

Huang Zhong has a calm personality, Li Yan is very happy, as long as there is an obvious difference in the judgment of the Yizhou army between the two people, then no matter which army leaves Huya Mountain, Zhang Ren has a way to encircle and annihilate the troops divided into two places.

After Zhang Ren listened to Fa Zheng's plan, he slapped his hand on his thigh fiercely, and said in admiration: "Xiaozhi is really wise, this plan is very good, I will arrange for my subordinates to start working!"

In the next few days, 100,000 Yizhou recruits hidden behind Jingmen Mountain were brought to the Jingmen Mountain position in batches, while the Yizhou soldiers who had originally defended Jingmen Mountain took advantage of the night to retreat out of the mountain. When all the soldiers on the mountain had retreated, there were only 40,000 soldiers transferred up the mountain. Next, Zhang Ren ordered the remaining 60,000 recruits who remained outside the mountain to be transferred to the top of the mountain in the Great White Heaven and Emperor Land, so that outsiders felt that there were 60,000 more soldiers on Jingmen Mountain.

60,000 recruits are being transferred to Jingmen Mountain in thousands every day, and it will take half a month until the final transfer is completed. In this half a month, the 80,000 Yizhou veterans who withdrew from the top of the mountain have bypassed Sheshan, and then went down the Yishui, and successfully captured the Yidao that was empty in defense.

After capturing Yidao, Zhang Ren ambushed 80,000 troops in the mountain forest leading to Yidao on the side of Huya Mountain, and then waited for the movement on Huya Mountain.

Some of the Jingzhou soldiers who were deliberately released by Zhang Ren from Yidao City, some fled in the direction of Jiangling, and some fled towards Huya Mountain. The Jingzhou soldiers who fled to Huya Mountain naturally had to report the news of the loss of Yidao to Huang Zhong and Li Yan. At that time, Zhang Ren commanded only 5,000 troops to attack Yidao City, and the rest of the army was hidden behind and not seen by the defenders in Yidao City. Therefore, when these troops reported to Huang Zhong and Li Yan, they said that the Yizhou troops attacking Yidao were only about 5,000 people.

After Huang Zhong and Li Yan listened to the reports of these soldiers, their thoughts were different.

Huang Zhong already knew that there were now reinforcements from a large army on Jingmen Mountain, which was across the river, so where did the 5,000 Yizhou troops that suddenly appeared near Yidao come from? Huang Zhong carefully studied the high-definition military map provided to him by Lu Meng, and then felt that the thousands of Yizhou soldiers who suddenly appeared under Yidao City were very strange, so he insisted on not rescuing Yidao for the time being, and carefully observed the follow-up actions of the defenders of Jingmen Mountain before making a decision.

As Li Yan, who assisted Huang Zhong in defending Yiling, he had different ideas from Huang Zhong, and he felt that Huang Zhong was too cautious. Since the number of Yizhou troops stationed in Jingmen Mountain has increased unabated, it means that the small force that suddenly appeared near Yidao this time is just a trick for Zhang Ren, and his main direction of attack is still Huya Mountain.

Li Yan proposed to Huang Zhong that he should lead 20,000 horses to Yidao to eliminate the small Yizhou army, Huang Zhong wanted to stop it, but Li Yan brought 30,000 troops when he came to Huya Mountain, and now he has left 10,000 people for himself, and he will not delay Li Yan to go down the mountain to accumulate meritorious achievements. Anyway, Yidao is very close to Huya Mountain, and if Li Yan encounters any difficulties, he can quickly retreat, and there must not be much of a problem.

In this way, Fazheng's plan will really succeed.