From the Ula Mountains all the way to the east, along the valley between the Ula Mountains and the Serten Mountains, it stretches for more than 500 miles. In addition, it takes a lot of time to climb over Daqing Mountain, so this journey is actually not short. Fortunately, most of the places outside the fortress are grasslands, and the terrain is flat and not too difficult to walk. Especially for cavalry, once the speed is fast, it won't take too long.

Shengle City, where the country is located today, was called Chengle County in the past, and it was the county seat of Dingxiang County.

After King Wuling of Zhao defeated the Hu people in the Yinshan area, he set up several counties in the Yinshan area, among them, the two counties of Yunzhong and Dingxiang are the areas where the current Guosheng Lecheng is located. Of course, at the beginning, there was only Yunzhong County, and Dingxiang County was separated from Yunzhong County in the Western Han Dynasty.

Among the border counties in the north today, except for Yunzhong and Dingxiang, most of them are in the hands of Daiguo, and the remaining counties such as Yanmen, Shanggu, and Shuofang have all been recovered by Li Xin. Previously, because of the fear of going to Daiguo, he did not continue to march to seize these two counties.

But now that Shi Yiqian has come to the door by himself, this is an excellent opportunity for Li Xin, and he will not miss this great opportunity to recover the two counties.

And once the two counties of Yunzhong and Dingxiang are taken back, it means that the entire south of Yinshan will become the border of the Tang Dynasty, and the deterrence of the Hu people in the north will be greatly improved.

The northern part of Dingxiang and Yunzhong counties is where the stretching Daqing Mountain is located, where the terrain is complex and the road is difficult to travel, but there are also roads that pass through it since ancient times. And after Li Xin's eastward march this time, he will climb over these trails.

Wyverns are heavy cavalry, and they can't wear heavy armor when they are on the road, and the same is true for war horses. Otherwise, these war horses will be exhausted on the road, where can they go to the battlefield to participate in the war.

Therefore, when the battle was over, the Wyvern Knights took off their heavy armor and put their armor and vest on their horses, while they rode on another horse. In the case of one person and two horses, this speed can be greatly increased.

The war is needed, so many things cannot be taken care of. Li Xin ordered to rush at full speed, and after the battle, he continued to attack for five or six hundred miles, and finally arrived north of Daqingshan.

There is a Beiyu County in Yunzhong County, which is located not far from the northeast of Hohhot City in later generations, and there are two trails that can cross the Daqing Mountain. Although the altitude is not low, and the road conditions are not very good, it is not too much of a problem for the march of thousands of troops.

Since a hundred miles to the southeast from Beiyu County is where Shengle City is located, therefore, the south entrance of these two roads is actually guarded by the Dai Army.

But because the Tang army is now concentrated in the south, and there is its own army in the west, these places can be regarded as the rear of the country in the past. Therefore, the country does not attach great importance to these places.

This is also the reason why Li Xin had to hurry up here, because after a long time, after Shi Yiqian learned the news of the defeat in the west, he would inevitably strengthen his defense forces. Although there is still a road from the east to Shengle City, the distance is too far.

Fortunately, it is a flying dragon rider who has undergone many years of training, otherwise, ordinary people would not be able to support it for a long time. Even so, before going over the mountain, Li Xin decided to let the army rest for one night.

Not only to let the soldiers recharge their energy and prepare for the next big battle, but also to let the war horses recover ~ physical strength.

And when Li Xin arrived to the north of Daqing Mountain, on both sides of the Yellow River in Yunzhong and the south of Dingxiang County, the atmosphere became more and more solemn. Because at this time, Li Erhei had already begun to mobilize troops and horses, and made a move to cross the river to attack.

Not only him, but also the Tang army on the west bank of Baiqushui also acted the same. The Tang Dynasty had a total of 40,000 troops, and from the west and south sides formed an oppression on the Shiyi Qianda army.

There was no movement yet, and there was only the Tang army in the area of Shanwu County, Yanmen County in the east, but Shi Yiqian did not dare to relax at all.

"Recently, the Tang army has made frequent moves, and I am afraid that it will attack soon! As soon as this battle starts, it will be a battle of life and death between us and Datang, and it will not be easy to end! Inside the tent, Shi Yiqian sat down with his confidants, and there was no lack of worry in his tone.

Although he has more than 100,000 troops in his hands, he is facing the Tang Army, an invincible army in recent years, and the opponent is still a person like Li Xin, who knows the army, so he really can't see much hope of winning.

"The king doesn't need to worry, with the soldiers and horses in our hands, it is already far more than the Tang army in the entire Shuofang. Although Li Xin has led his troops north to reinforce in recent days, even with the addition of those 30,000 troops, it is less than half of us. To put it mildly, even if we can't beat each other, it shouldn't be difficult to make each other unable to cross the river! Lang Zhongling Xu Qian said.

These words made Shi Yiqian feel a little relieved, after all, if the war really didn't go well, at least he could protect himself!

"I don't know what's going on over there!? If they had crossed the Yellow River first, they would have been able to echo with us, which would have been extremely beneficial to us. Even if they have never crossed the river, as long as they can occupy Wuyuan, Shimengang and other places, the Tang army on the front line of Baiqushui will be self-defeating. When the time comes, the north of the river will be back in our hands, and it will be worth the trip! Speaking of this, Shi Yiqian thought of Tuoba Yujun's side and couldn't help but say.

"I think there will be news soon. After all, Li Erhei was stepping up preparations for war in the south, and Tang General Sun Tie would not make any moves. It's just that when he has fewer troops on his side, he shouldn't be able to stop the world, as long as he waits for another day or two, the result should be out! Liu Kuren replied.

Although he was defeated last time, this did not affect Shi Yiqian's trust in him, and this time he still followed him when he went south.

"I hope so! For some reason, since he agreed to form an alliance with Yan State, this king has been uneasy in his heart. This has been especially true in recent days, often waking up in the middle of the night. I'm afraid that this time the matter of going south will not go well! By the way, hasn't there been any movement on Yanguo's side? Shi Yiqian sighed and said leisurely.

"Judging from the current situation, except for Murong Wen's soldiers and horses who have never been seen, the rest of the Youji and other states, basically there is no movement of the Yan army." Zuo Changshi Yanfeng replied.

"Hmph, after saying that they will form an alliance and act together, they will sit still. Isn't it because you want to use us to fight to the death with Tang Jun, and then come out to make a profit? Hearing this, Shi Yiqian couldn't help but snort coldly.

Just as Yan Guo had to wait for him to make a move before sending troops, Shi Yiqian also wanted to see Yan Guo make a move before coming to fight the Tang army. After all, Yan Guo was worried that Shi Yiqian would release his pigeons, and Shi Yiqian was also worried that in the end, he would face the enemy of Datang alone.

If it weren't for the threat of Datang, which was really in front of them, I am afraid that it would be impossible for such two forces to form an alliance at all.

Originally, the soldiers were fast, and if Shi Yiqian wanted to attack Tang, after the soldiers and horses arrived, they should quickly move south with the momentum of thunder. Strive to cross the Yellow River in the shortest possible time, completely defeat Li Erhei's troops, and then go south to attack Beidi and Shangjun.

But it was because he wanted to attract the main force of the Tang Dynasty to the north to win time for Yan Guo, and at the same time, he was also watching Yan Guo's actions. Therefore, in the end, it will cause him to stay on the north bank of the Yellow River for too long after sending his troops.

By now, the reinforcements of the Tang Army have arrived, and it is no longer easy to cross the river as easily as before.

I have to say that in this matter, Shi Yiqian is a chess game.

"However, now that we have sent troops south, it is useless to think about these things. I hope that after Yan Guo sees our actions, he will immediately send troops to attack Tang! Yan Feng said helplessly.

"That's it, order the army to prepare! After crossing the river tomorrow, Li Erhei's army on the south bank will be wiped out first. After occupying both banks, we will deal with the enemy forces on the west bank of Baiqushui. As long as the war is calmed down here, we will immediately go south to Xihe and Shangjun. At that time, even if Yan Guo doesn't do it, it won't have much impact on us! After thinking about it for a while, Shi Yiqian finally decided not to wait any longer.

At this time, he still reported hope to the Tuoba Orphan Department in the west, so he would first solve Li Erhei and them on the south bank.

Otherwise, in this case, what he should be worried about is whether the Tang army will take the opportunity to advance eastward and cross the river from Baiqu to intercept his rear after defeating Tuoba Gu's soldiers and horses. Of course, he would think this way because he thought that Li Xin was on the other side!

On the south bank, in Li Erhei's Chinese army tent, the messenger sent by Sun Tie had just arrived here.

"Okay, Your Highness will destroy the 50,000 generations of troops in one fell swoop, and we will have no worries. Shi Yiqian doesn't know this news yet, but we just took the opportunity to attack and catch him off guard! After knowing this important news, Li Erhei couldn't help but feel relieved.

"That's exactly how it should be! However, how does the general plan to attack? After all, there are 50,000 troops on behalf of the country to defend us on the north bank, and after the defeat of Liu Kuren last time, they should be more cautious. If we want to cross the river and fight, I'm afraid it will not be easy! Deng Qiang asked on the side.

"I've made up my mind about this! Since Shi Yiqian didn't know that Tuoba Gu's soldiers and horses had been wiped out by us, then we would attack from the Baiqushui area. General Deng led an army of 10,000 men across the river from the west tonight and rushed to join General Zhang Hao. Tomorrow, after I make a large-scale attack here and attract all the attention of Shi Yiqian, you will lead your army to cross the Baiqu River, wipe out the 30,000 generations of troops in one fell swoop, and then quickly go south to cut off the back road of Shi Yiqian! In this way, the victory and defeat have been divided, and there is no need to worry! Li Erhei smiled slightly, pointed to the map in front of him, and said leisurely.