An Qingxu sighed after receiving Cui Qianyou's report that the attack on Tongguan had been halted by a large flood in the forbidden ditch, which had caused the bodies piled up in the ditch to form a bridge and more than 1,000 soldiers who were passing through the Yellow River.

The forbidden ditch natural danger can be said to be an extremely insurmountable gap in their minds, which is very headache. After the defeat of Lingbao's army, a large number of corpses of Tang army sergeants almost filled the forbidden ditch, making the forbidden ditch almost a thoroughfare, after receiving Cui Qianyou's report at the earliest, An Qingxu was overjoyed, and repeatedly ordered Cui Qianyou to launch an attack on Tongguan City at any cost. Cui Qianyou did the same, but he didn't get his wish, and finally collapsed under the city, and the protruding water in the forbidden ditch made all his efforts come to naught, which also made An Qingxu extremely disappointed.

What disappointed him even more was that An Qingxu actually stopped the attack on Tongguan City after the flood rose in the forbidden ditch, and led the army to retreat and rest.

After receiving the news from Cui Qianyou, An Qingxu was furious, what he wanted was to continue to attack, not to give the Tang army at the head of the city a chance to breathe, and strive to capture Tongguan City before the follow-up reinforcements of the Tang army arrived.

An Qingxu knew that if the Tang army reinforcements arrived one after another, the difficulty of attacking Tongguan City would increase exponentially, even if they could resolve the difficulties caused by the forbidden ditch natural danger, with the tall walls and steep terrain of Tongguan City, it would be very difficult to attack the city. After receiving Cui Qianyou's report, he immediately ordered the attack to continue, and personally led a group of men and horses to rush to Cui Qianyou's headquarters near Tongguan.

Cui Qianyou was embarrassed for a while after receiving An Qingxu's order to continue the attack.

He had ordered his entire army to retreat, ready to rest and fight again.

If the sergeant is forced to fight again without resting, not to mention that he will have to pay a greater price, the morale of the army will also be greatly affected, and there is no hope of achieving results at all, and the sergeant's life will be wasted. Therefore, he also urgently reported to An Qingxu and explained the reason clearly, and at the same time immediately ordered the sergeants to rest, replenish food and water, and at the same time ordered his generals to prepare for all preparations for the attack at night.

Although Cui Qianyou's order to stop the attack was a bit stupid, it was not unreasonable, An Qingxu rushed to Cui Qianyou's command office, and after listening to the explanation in person, his anger also disappeared a little, he took a rough look at the terrain of Tongguan City, and after listening to Cui Qianyou's report, he further understood that Suitong Guancheng was easy to defend and difficult to attack, and did not further blame Cui Qianyou, but discussed how to attack next.

Hundreds of thousands of soldiers and horses under the Lintong Pass, the Hantong Pass has been captured, no matter what, it is impossible to retreat like this, even if it has just suffered heavy losses, even if there are great difficulties in front of it, we must work harder.

"Siege the city overnight!" This is the conclusion that An Qingxu reached after convening all the generals and senior generals to discuss.

How to attack the city, they also have the latest idea, that is, to fill in the soil to build a road, and turn the forbidden ditch into a thoroughfare.

The direction of the east gate and the north gate is too dangerous because of the terrain, which is not suitable for large-scale troops, but it is only a feint attack, and the main attack can only be at the south gate. But attacks from both directions will continue all the time, and the best results will be achieved.

After the order was given, the sergeants, who had been rested for more than two hours, immediately moved into action, preparing to carry out a continuous attack on Tongguan City at night. They were given the order to fill in the ditch outside the previously forbidden south gate before the attack began.

Outside Tongguan City, more than 100,000 horses have accumulated, as long as each person has a handful of mud, the forbidden ditch can be filled.

Now the water flow in the forbidden ditch is much smaller than in the afternoon, the water level is only half the height of the calf, and in the process of gradually decreasing, by tomorrow, it is estimated that it is only at the height of the dorsum of the foot, if more than 100,000 people work together, the forbidden ditch can be filled.

The decision was made, and the sergeants acted immediately, and about half an hour after the Tang army Zhang gradually arrived at Tongguan, Cui Qianyou commanded the former soldiers and horses to start a large-scale siege of the city again.

Yang Xi was not surprised when he heard the sergeant's report that the rebels were attacking the city overnight, but when he went up to the city and saw the torches flashing all over the mountains, he was still a little shocked.

More than 100,000 horses, tens of thousands of torches, dotted the entire mountain with stars, very spectacular.

It's almost a month and a half, the moon is quite big, the moonlight illuminates the mountains and fields out of a rough outline, and the formation of the rebel sergeants can be vaguely seen, the black pressure is very scary, everywhere, and the momentum is even more terrifying against the background of the torches. However, the Tang army sergeants on the head of the city did not pose a very big pressure, the brutal formation during the day has been experienced, the rebels almost attacked the city, and now the rebels have not begun to attack the city, and the pressure cannot be greater than during the day, not to mention that the rebels have not yet arrived under the city, but only to the east edge of the forbidden ditch.

"Marshal Yang, the rebels attacked the city at night, it should just be a tired tactic, not letting our army rest, and trying to drag down our sergeants!" Wang Sili, who was standing side by side with Yang Xi on the tower of the city gate, looked at the torch array that was slowly advancing in the direction of the forbidden ditch, and said with a little doubt: "Marshal, the last general is a little puzzled, why did Cui Qianyou give up the opportunity to continue the attack during the day, abandoned nearly 10,000 sergeants and stopped the attack after the city of Tongguan, and after nightfall, he ordered the sergeants to attack again?" He shouldn't do this!"

"General Wang, if Ben Shuai's expectations are good, it should be An Qingxu who led the army to arrive and personally commanded the siege battle, Cui Qianyou was forced by An Qingxu to attack overnight!" Yang Xi looked at Wang Sili and the other generals, and said in a very confident tone: "The rebels attacked the city at night, they must not have expected that our reinforcements had arrived, and they still wanted to take Tongguan while our reinforcements had not arrived!" If we find out that our reinforcements have arrived, we will definitely lose confidence, and it is not certain that we will stop the attack soon!"

"What Marshal Yang said is reasonable!" Pang Zhong on the side continued, "The rebels are attacking like this today, regardless of the cost of casualties, they just want to take advantage of the fact that our reinforcements have not arrived, to break through Tongguan, if they find that our reinforcements have arrived, then they are likely to stop attacking, and even retreat from Tongguan and return to Luoyang!"

The other generals also responded to Yang Xi and others, and Ge Shuhan, who had been silent, did not object.

Seeing that everyone thought so, Yang Xi became more and more firm in his thoughts, and then said: "You all think so, that Marshal decided that after a while, the rebels will start to attack the city and then return fire with all their might, so that the rebels will have the illusion that a large number of my reinforcements have arrived in Tongguan, so that their belief in victory will be frustrated!"

"Yes, Marshal, the Admiral understands!" The generals responded in unison.

Yang Xi gave another order with a cold face: "The forbidden ditch is dangerous, and the rebels can't launch a large-scale attack on the city, maybe they will use mud and stone or bamboo to fill the ditch to cross the forbidden ditch!" We must not allow the rebels to fill the forbidden ditch, we must deal a severe blow to it, so that the whole army is ready to meet the rebel siege with the most dense arrows! Let them taste what it means to rain arrows!"

"Yes, Marshal!"

Just as the generals responded in unison, the war drums of the rebels had already beaten, and countless sergeants shouted loudly and rushed towards the direction of the forbidden ditch!