When Yan Pingtao knew that Chen Xian had given up the training of all-round cavalry, although he relied on this tactic to create a piece of the sky in Liaodong, he immediately began to reflect on why this tactic was abandoned by Chen Xian.

In fact, the first person in the world to learn Chen Xian's casting of copper cannons and learn to make flintlock pistols was none other than Wanyan Pingtao.

Over the years, Wanyan Pingtao has been staring at Chen Xian's development, and his meticulous work has been active in the East China Sea Kingdom, stealing various secrets of the East China Sea Country through kidnapping and seduction.

If there is anyone in this world who knows more about his technical system besides Chen Xian and his students, it must be Wanyan Pingtao.

By studying Chen Xian's various tactics, Wanyan Pingtao has also been improving his tactics over the years.

The all-powerful cavalry had long been abandoned by Wanyan Pingtao, and the infantry had made many adjustments based on the information they had obtained from the East China Sea Kingdom.

On Chen Xian's side, because he did not pay enough attention to Wanyan Pingtao, and because Wanyan Pingtao was located in a remote area and it was inconvenient to come and go, Chen Xian's intelligence work on Wanyan Pingtao's Northern Jin Kingdom was relatively backward, which made him seriously underestimate Wanyan Pingtao.

After Yang Miaozhen led the army to the northern edge of the fortress belt in northern Shenzhou, he left behind the engineering team with the army, leaving a horse infantry division and a chaser division to protect the engineering team.

She asked the engineering team to lay a belt of fortresses from south to north along the western edge of the eastern mountain range of the Liaohe Plain.

On the western edge of the mountainous region of eastern Liaodong, there are many rivers that gush out of the mountains, which are both resources and obstacles.

The engineering team had to lay a belt of forts along the mountainous area from Shenzhou to Xianzhou, not only to build dozens of forts, but also to cross the river for at least three days.

Fortunately, with cement and a large amount of steel, the bridge repair technology of Donghai Province has been greatly developed.

On some of the larger rivers, Chen Xian's engineering team would build huge piers with cement on both sides of the river, then fix the thick iron cable to one side of the pier, and then use horse-drawn carts and ropes to pull the other end of the iron cable across the river and fix it on the pier on the opposite bank.

Two iron cables, covered with wooden planks, are a simple iron suspension bridge.

As long as the piers are large enough and the cables are thick enough, such a suspension bridge can pass horse-drawn carriages weighing several tons.

In addition to the suspension bridge, the team will also build piers on both sides of the river to transport supplies by ferry.

After settling the engineering team, Yang Miaozhen led the army to cross the Panhe River through the temporary pontoon bridge and went north first.

The army marched north for more than 100 miles along the eastern edge of the mountainous area of Liaodong, and after crossing a large river, they saw the fortress belt in the south of Xianzhou in the distance.

The fortress belt in the southern part of Xianzhou looks almost identical to the fortress in the East China Sea Kingdom, with the same thick cement fortress and the same thick fortress wall made of straw bags of earth.

Seeing such a fortress, Yang Miaozhen's face was very ugly.

As a general of the East China Sea Kingdom, Yang Miaozhen knew very well that this kind of fortress was terrible to the besieging party.

Although intelligence shows that there is indeed a fortress belt in the south of Xianzhou, Chen Xian and Yang Miaozhen take it for granted that the so-called castle belt is just a knockoff similar to that built by the Jin Kingdom.

But the fortress belt that appeared in front of Yang Miaozhen was by no means a copycat, and the four thick fortresses at the four corners of the fortress were definitely built of cement.

Of course, these things that Chen Xian made up were used to deal with the enemy, of course, but when such things were placed in front of him one day, Yang Miaozhen only felt that his scalp was numb.

According to the military standards of the East China Sea Kingdom, the cast iron cannons used for external use on the four corners of the fortress are all giant cannons with a caliber of more than thirteen catties! These giant cannons have a greater range and are more powerful than the nine-pound field guns!

Moreover, the fortress wall, which is built with straw bags and has a 45-degree slope, is not at all something that a nine-pound cannon can shake!

To attack such a fortress, it is necessary to have siege cannons capable of destroying the turrets of the fortresses.

The unrelenting Yang Miaozhen first set up camp by a small river more than ten miles away from the enemy's fortress.

Early the next morning, he had the infantry line up to protect the artillery and test the fire of the fortress.

Receiving the order, the infantry division and artillery regiment slowly unfolded, lined up in a wide transverse plane, and pushed towards the bastion.

When Chen's infantry division and artillery regiment entered the three-mile range of the fortress, a dull and violent shelling sound sounded on the fort turret, and the shells seemed to cut through the sky slowly and quickly, falling into the artillery line of the Chen army, smashing an artillery carriage to pieces.

Seeing this scene, Yang Miaozhen decisively gave the order to retreat, and the fortress was indeed loaded with a thirteen-pound cannon.

Just when Yang Miaozhen was at a loss, Wanyan Pingtao led the army to the edge of the fortress belt to face the battle.

Wanyan Pingtao led about 20,000 infantry and 30,000 or 40,000 cavalry.

Over the years, after Yan Pingtao defected to Mongolia, he began to use his status as an ally of the Mongols to gather the Jurchen tribes in the Liaodong region.

Coercion and temptation, subjugation by force...... In order to subdue the Jurchen tribe in eastern Liaodong, Wanyan Pingtao did everything he could, almost sweeping away the Jurchen tribe in eastern Liaodong.

He relocated all the Jurchen tribes close to the sphere of influence of the Donghai Kingdom to Huanglongfu, Huiningfu, Huli Route, and other vast areas.

These places are the vast plain area from today's Changchun City to Harbing City, as well as the plain areas on both sides of the Heilongjiang River from Jiamusi City to Boli, Russia.

Although these areas have cold winters, they can grow food in summer, and they are rich in wildlife resources to feed many people.

After these years of hard work, Wanyan Pingtao's subordinates have also gathered nearly one million Liaodong Jurchens and some Khitans, Bohai people, Gaoli people and other ethnic groups.

Using this population, Wanyan Pingtao built a huge army with a population of nearly 100,000.

In order to arm this army, Wanyan Pingtao had to drive the people to mine copper and iron coal mines and smelt metals......

Such heavy labor made the Jurchens, whose production efficiency was already relatively low, miserable due to climate reasons.

In order to reduce the burden on the people under his command, Wanyan Pingtao had to only conscript laborers every winter to carry out industrial production, and stop work in summer to let the people cultivate grain.

Even with such measures, the economy of the North Kingdom is often on the verge of collapse, and there have been some signs of instability within the country in the past two years.

But in any case, Wanyan Pingtao relied on the heavy internal pressure to maintain a huge army with fairly good equipment.

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