Zhang Zhongjian didn't know the opponent's plans, he naturally had his arrangement, 20,000 miners, not for hand-to-hand combat, the most important thing was to do auxiliary work.

In half a month, I went all out to rush the work, and the simplest Mitsubishi nails with the lowest material requirements were made nearly 300,000 times. Of course, this thing is okay for defense, but it is not very useful for attack, so Zhang Zhongjian took out two other things.

The latest generation, portable bed, this is the model set by Zou Yu before he went to Liaodong, a large number of steel is used, and pulleys are used, so it is very easy to carry and assemble, and now only needs a group of five people to assemble.

This kind of crossbow not only uses pulleys, but also a winch, which is driven by gears, and only one person is needed to wind the crossbow arrows, and the most important thing is that this kind of crossbow arrows use arrow boxes, five in a box. Although this repeater is a little smaller, it is still as thick as a thumb and fifty centimeters long.

Compared with the three-bow and eight-bull crossbow, the range of this repeater is not much inferior, and the maximum limited range can reach 800 meters! The only flaw is the pulleys and gears, which need to be forged by hand, otherwise the service life will be very short. Even if it is fully crafted, there are only 100 crossbows and 2,000 arrow magazines at present.

Another sharp weapon is the Mitsubishi arrow, which, like the Mitsubishi nails, can be made with molds, so there are quite a few of them. I didn't use it before, because this thing was too lethal, and the middle one was bleeding nonstop, so it can be said that it was basically not saved.

However, the production of this arrow is too simple, easy to imitate, even if it is all done by hand, it will not take much time, if it is used by others on their own people, then the fun will be great.

In view of this, the arrows of this kind of Mitsubishi arrows, Yanmen Pass and Tongguan, Pingzhou, and Liaodong have all prepared 120,000 pieces, and they are not allowed to take them out until the critical moment, and now they are naturally at a critical juncture.

Rejecting the horse can not only block the war horse, but also block the foot soldiers, sharpen the wood, and break into the ground, making two defensive rings. Near the defensive ring, Mitsubishi nails were scattered on the ground. This kind of Mitsubishi nail that is simple to make is actually a very lethal thing, especially when most people don't know about disinfection, the wound is easy to suppurate.

The trench is not deep, but you need to climb up, you only need to take a spear and stab down, even if you are just a miner, you can complete the defense task well. In between absenteeism, there were beggars armed with swords and shields, so mixed together to increase the number of men for defense.

On top of the camp's arrow tower, there are two floors, on which the longbowmen stand, surrounded by wooden planks to prevent enemy bows and arrows.

The camp set up by 20,000 or 30,000 people in half a month can be imagined how solid it is and how perfect the defensive measures are.

Wang Fubao and Gao Shixing looked at the camp and couldn't help but feel a very headache, this kind of defense is not much different from a city to a certain extent.

Zou Yu knows that there are two infrastructure maniacs, one is called Yingzheng and the other is called Yang Guang, but they build a lot of them for enjoyment, Zou Yu also likes to engage in infrastructure, but more for the people's livelihood and national strength, for the city, defense, he also attaches great importance to infrastructure, and implements this concept very thoroughly. On every expedition, a large number of auxiliaries were just to fiddle with various defensive measures.

Now Jinyang Medical College, the first batch of more than 800 students who are not qualified as doctors and only learn wound dressing and treatment followed them to Liaodong; And the second batch, 1,000 people, arrived at Tongguan, Youzhou and Pingzhou.

In some respects, wound treatment is very simple, and a proficient person can also bring a few ordinary auxiliaries who don't know anything, so that the wounded soldiers can be properly cared for.

The presence of the medical soldiers gave the soldiers more comfort in their hearts, and also reduced the worry of many injuries on the battlefield, so that they could let go of their hands and feet to fight.

Whether it is equipment or logistics, as well as the quality of life under Zou Yu's command, compared to the rest of the forces, the gap is not ordinarily large, this is because the time is too short, and the longer the time, this gap will become bigger and bigger. This is also the reason why Zou Yu is reluctant to do it in the past two years.

Emptied the savings of Liaodong, emptied the inventory of Daxing City, hollowed out the materials for the attack on Goguryeo, Yang Guang transported to Youzhou, and most of the grain in Yongfeng Cang was also used up, which is why there is now prosperity, if the development is dragged down because of the war, Zou Yu thinks that this is meaningless.

Taking the domestic city, even if Goguryeo no longer has much defensive strength, in fact, Zou Yu does not want to continue to attack, this is a shortage of manpower, even if it is defeated, governance is also a problem, and there is another reason, that is, Silla and Baekje have truce, and they invariably mobilize troops to the border of Goguryeo.

If Zou Yu continues to attack Pyongyang, he will easily be benefited by Silla and Baekje fishermen, and continue to attack Silla Baekje, and his strength will not be enough. Of course, if it is said that the Central Plains soldiers and horses are transferred, there will definitely be no problem in fighting hard, but how could Li Yuan, Wang Shichong and others let go of such a good opportunity.

Li Yuan and the others sent troops this time, which was reasonable and expected, and Zou Yu had also been paying attention to this issue, just looking at the time of their dispatch to decide his next plan.

Winning the domestic city and unifying the northern part of the Yalu River, this goal has been achieved, and the strategic goal has been successfully achieved, and now it is just to wait to see how Goguryeo reacts, to see how they will respond, whether to fight to the death or to sue for peace.

If it is a desperate battle, then there is nothing to say, only to accompany him, if peace, this is more actionable things, how to do it, they are also discussing, for the possible reaction of Goguryeo, make inferences, and make a plan in advance.

Fortunately, Gao Jianwu didn't let them wait for a long time, and ran back to Pyongyang in embarrassment, and after reading the letter he wrote with Eulji Wende, Gao Jianwu seemed to have become mature overnight, and personally took people to Jilin City.

"Kill!" With an order, the soldiers marched to the beat of the drum and rushed to the forward camp, followed by one arrow tower after another, and catapults.

This is the siege equipment that Wang Fubao tried his best to get out, although it was decided to take Pingzhou at all costs, but it was the best to be able to do it at the lowest cost.

Because it is not clear what the battle situation in Liaodong is, what it is, and when Zou Yu will return to the division to rescue, Wang Fubao feels that the time is very tight, and the hundred catapults are brought by the expedition, and the arrow tower has no choice but to build it on the spot.

From the defeat of the first wave, after receiving the order to continue the attack, they began to produce, and drove out thirty units, which was already the maximum limit, and continued to drag on, worried about the arrival of follow-up support, so after discussing with Gao Shixing, the two immediately commanded the army to start attacking.