Irrigating the city with river water is a relatively common tactic for the army to conquer the fortified city in this era, as long as the conditions permit, many generals will choose, so there is no objection to Chai Rong's will. But Chai Rong later asked the "Shenji Army" to set up artillery in Changlian City, and the intention of bombarding the city walls of Taiyuan City was different. Although Chai Rong emphasized that it was a place that could be used by the defenders to avoid the artillery fire of the Zhou army when bombarding the left side of the city wall, the ministers, whether they knew anything about the "Shenji Army" or not, knew very well that whether it was artillery or ballista, its accuracy was very limited, not to mention the stone thrower with worse accuracy. In the past, when the bombardment was carried out on the city, many shells and gunpowder bags had already crossed the city and landed in the city, so that many houses were destroyed and many people were killed and injured. Now Chai Rong has moved the target inward again, asking the "Shenji Army" to cross the city and bombard the hiding place of the defenders who don't know where they are. Although Taiyuan City has not been able to be attacked for a long time, it is the puppet Han court and Liu Jun, the pseudo-emperor, who stubbornly resist with Taiyuan City, not the innocent people in the city. Therefore, as soon as Chai Rong's will was given, many ministers wanted to come forward and persuade Chai Rong to retract his life.

It's a pity that after realizing that there may be people in the city who are from the Beiping Military Jiedu Mansion and are very familiar with firearms to give advice to the puppet Han court and resist the conquest of the Great Zhou, Chai Rong obviously has a deep hatred for this Taiyuan city that may make him relive the humiliating experience under Youzhou City. Therefore, after the decree was announced, he had already gotten up and left his seat, and quickly turned into the back tent, not giving the ministers in the tent any chance to speak out and disrupt him. Seeing that Chai Rong was so resolute, although the ministers were unwilling, they had no choice but to give up, and they had no choice but to act according to the emperor's will.

As a result, since the afternoon of the eighth day of the seventh lunar month of the seventh lunar calendar of Xiande, nearly 100,000 Zhou troops have all taken action, slender and connected the city, digging trenches and embankments, and diverting water from the river.

On the afternoon of the second day after Chai Rong ordered the "combination of fire and water" to attack Taiyuan City, the information about the main content of the imperial military conference was transmitted to Xin Feiyu through the palace room of the "Dark Feather" Kaifeng Branch Hall and the "Dark Feather" Taiyuan Branch. In this regard, Xin Feiyu naturally attached great importance to it and immediately found Yang Ye to discuss.

Xin Feiyu's visit was in Yang Ye's heart, because as a veteran general, Yang Ye had already guessed that the other party was going to turn a strong attack into a long siege and flood the city with water not long after the Zhou army began to build a long city outside the city, and began to actively think of countermeasures to deal with it. Of course, Yang Ye was not concerned that the Zhou army would collapse the city wall by diverting water to irrigate the city - with the strength of Taiyuan City, this could not be done in a few months - but that after the flooding of Taiyuan, the Zhou army would turn land warfare into water warfare, build a large number of ships and rafts, and take advantage of the height difference between the water surface and the city's head and the ground, which was much smaller than the ground, to launch a new onslaught on Taiyuan City. At that time, it is difficult to say whether the Han army, which has lost its greatest advantage and reliance, will be able to hold it. Therefore, even if Xin Feiyu didn't come to him, Yang Ye planned to take the initiative to discuss with Xin Feiyu.

Previously, Yang Ye was only worried that it would not be conducive to defending the city after the Zhou army dug the river and diverted water, and did not think that the threat was imminent, but when Xin Feiyu told him that Chai Rong was now ruthless, and planned to set up cannons directly on the top of the city after the construction of Changlian City, and bombarded the so-called "defenders' hiding places" within the city walls, Yang Ye found that the original situation was much more serious and urgent than he imagined - now there are nearly 100,000 soldiers and civilians in Taiyuan City, and once the Zhou army starts shelling the city, it is bound to suffer heavy casualties. In particular, half of them have just moved into the city from other places, and the people's hearts are already unstable, and now with the stimulation of flooding and shelling, there will be chaos if they don't do well. At that time, Taiyuan City was turned upside down by its own people, and the Zhou army outside the city could just take advantage of the fisherman, and it was easy to take the long-lost Taiyuan City. …,

Therefore, after getting accurate information from Xin Feiyu, Yang Ye did not dare to be careless, and immediately took him all the way into the palace to ask for Liu Jun to discuss countermeasures.

As an emperor who didn't have much courage, Liu Jun was helpless against such a situation. The civil and military generals who were summoned by him to the palace to discuss the military aircraft also could not come up with any valuable and feasible methods. Seeing that the Manchu Dynasty had nothing to do, Liu Jun had no choice but to put his hope on Xin Feiyu and the Beiping army behind him. In order to get more powerful support from the Beiping Army, Liu Jun even proposed to Xin Feiyu that if the Beiping Army could keep Taiyuan City intact, he was willing to make a brotherhood with Wang Kunjun, Xu Shaoan and other leaders of the Beiping Army, and marry the sister of his queen Guo to Wang Kunjun, and the two sides would be reconciled forever.

Regarding Liu Jun's request that the Beiping Army give more support to the Northern Han Dynasty as soon as possible, Xin Feiyu naturally would not refuse, and immediately said that he would repair a letter immediately after he returned, send capable people to sneak out of the city, and send it to his brother Yang Xin who was sitting in Lingxian Mansion as soon as possible, and then Yang Xin would transfer it to the brothers in Beiping City. He also repeatedly emphasized that since the Beiping Army had formed an alliance with the Han Dynasty before, it would never sit idly by and watch the fall of Taiyuan City. After receiving their letters, the brothers in Beiping City will definitely come up with a necessary and practical way to ensure that Taiyuan City is not lost.

As for Liu Jun's plan to marry his sister-in-law to Wang Kunjun, Xu Shaoan and others, especially Liu Jun's plan to marry his sister-in-law to Wang Kunjun, because it involves Wang Kunjun's private affairs, Xin Feiyu did not dare to take care of all of them. Instead, he thanked him again and again, hinting that there should be no problem with the two sides being brothers, and Wang Kunjun still needed a nod to become in-laws, and said that he would convey the good intentions of the Son of Heaven of the Han Dynasty to Wang Kunjun and others, and the brothers would decide.

Although it was a long way from Taiyuan City to Beiping City, even if Xin Feiyu repaired the book immediately, it would take many days to get a reply to find the border, especially when Taiyuan City was surrounded by groups. But on the one hand, Liu Jun was full of confidence in the Beiping army, on the other hand, it would take a while for the Zhou army to build the city and divert water, and if the Beiping army acted immediately after getting the news, it would still have time to make an effective response before the Zhou army attacked with fire and water, and it would delay or even force the Zhou army to retreat. Therefore, Liu Jun, who got Xin Feiyu's promise, was still very happy in his heart, and gave a large amount of rewards to the "Beiping Army Military Advisory Group", so he let Xin Feiyu leave the palace and wrote a letter for help to the Beiping Army.

Although Xin Feiyu promised in the palace that Liu Jun would immediately write a letter asking for help to his brothers in Beiping City and send someone to Beiping City as quickly as possible, he would not really do so, because he had a faster and more convenient way to get in touch with Beiping. Therefore, after returning to his residence from the Northern Han Palace, Xin Feiyu did not care about resting, so he went straight to a hut that was placed under the heavy protection of his entourage, and dictated a telegram about the current situation of Taiyuan City to the telegraph operator inside, and asked him to immediately send it to the Beiping Military Jiedu Mansion for discussion with the brothers of the committee and the military department and other relevant departments.

On the one hand, it is important whether or not to directly send troops to intervene, and on the other hand, although the situation in Taiyuan is tense, whether it is to build a long city or irrigate Taiyuan City, it will not be possible to achieve it in a short time and a half, and the Beiping Army has enough time to discuss this issue. Therefore, after Xin Feiyu's telegram was sent, the committee did not call back quickly, but made Xin Feiyu wait for three days before giving him a clear answer:

First, on the 10th day of the seventh lunar month of the seventh lunar calendar of the seventh year of Xiande, Lao 35 Muttel led the "Ranger Battalion", the Independent Cavalry Regiment, the cavalry regiment under the jurisdiction of the two synthetic infantry divisions, the "Wolf Tooth Battalion", and the 11th Regiment of the "Security Army" and the two temporary cavalry regiments composed of most of the men and horses of the "Security Army" independent regiment composed of the Han people, Bohai people, Xi people, and Jurchens from the former Khitan Zhongjing Road, plus a small number of artillery, a total of more than 12,000 cavalry left Lingqiu County and entered the Northern Han Territory from the bottle. Then this army dressed as a Khitan reinforcement will abandon the main road and take the small road, avoid the area where the Later Zhou army may send scouts to reconnoiter and explore, and march all the way south in a concealed way, heading straight to Taiyuan City, and it is expected that it will take about twelve to fifteen days to reach the surrounding area of Taiyuan - although Lingqiu to Taiyuan is only five or six hundred miles, and everyone in Mutel's department has horses, but because they need to march covertly, they cannot take wide avenues, they can only take small roads and even mountain roads that are not suitable for cavalry to pass, So it takes a lot more time than going south along the main road. …,

Second, the First Composite Infantry Division of the "Flying Dragon Army," with the exception of the division's cavalry regiment that had already left for Lingqiu with Mutel, as well as all the units of the first, second, third, and fourth regiments of the "Security Army," under the leadership of Zeng Zhilin and Wang Feng, who had just been ordered to rush back from Shanhaiguan, had set out from Beiping City on the 10th day of the seventh lunar month to Lingqiu County, and it was expected that they would arrive within 10 days. After the army arrived at Lingqiu, it would enter the first level of combat readiness and be ready to go south at any time to carry out a frontal direct military intervention against the Later Zhou invasion of the Northern Han -- since the Later Zhou army invaded the Han Dynasty, the Khitans had not moved at all, and the committee and the military department judged that the Khitan army, which had been severely injured in the Battle of Youyun the previous year, was incapable and unwilling to go south to save the Han, so Wang Feng ordered Wang Feng to temporarily hand over the defense of Shanhaiguan to Qian Yuanshan and take charge of it, and rushed back to Beiping City to participate in the intervention against the Han Dynasty.

Third, the committee demanded that Xin Feiyu pay attention to his safety and, unless it was particularly necessary, avoid going to the front line of the confrontation between the Zhou and Han armies, as well as the area where the Later Zhou army was shelled. Because the Later Zhou army occupied Taiyuan City, the Beiping army could still find a way to recapture it. But if Xin Feiyu has three longs and two shorts, the loss will be completely irreparable.