After the exercise, Mu Qingli went to Lin and Liang Laohan to discuss the continued reclamation of the Zhendong Army.

Since Mu Qingli's things about farmland are fixed to find the two, the two have become the resident agricultural experts of the Zhendong Army, seeing the high hopes of the Zhendong Army, the two of them are more diligent and attentive, combined with Mu Qingli's teaching, they have studied a lot of useful agricultural methods, which have brought a lot of benefits to Weizhou farming.

The war came unprepared.

Hu Hai gathered 50,000 soldiers and horses, and at this time he was attacking Qi'an City in a big way.

Fortunately, Qi'an City was already like a cold gate, equipped with powerful bows and crossbows, and for a time the Huhai army could not advance.

After receiving the news, Zhao Ziyi personally led 20,000 horses to support, and at the same time, Lin Ji will also go with him, taking the big guy who has been making it for a long time, to show everyone its power for the first time.

At Mu Qingli's insistence, Zhao Ziyi agreed that Su Xiang would go with twenty nurses, breaking the convention of marching without women.

Mu Qingli was named the deputy general of the rear this time, joined the support team, followed Zhao Ziyang's side, and came to Qi'an City after half a day's journey.

As soon as they got off the horse, Zhao Ziyi and the others galloped up to the city tower, "How is the battle going?" ”

"Report to the general, the Huhai army is prepared this time, and the front charge is holding heavy gold shields, which greatly weakens the role of the bow and crossbow, but fortunately, the penetration of the bow and crossbow is too strong, and the enemy has to move forward cautiously step by step, and has now attacked four hundred meters outside the city gate."

Hearing this, Zhao Ziyi nodded, and asked Mu Qingli and Lin Ji who came up to him, "Four hundred meters, is it within the range?" ”

Mu Qingli looked at Lin Ji, Lin Ji pondered slightly, and nodded affirmatively: "It's just within the edge range, but, General, my subordinates suggest that the enemy go to three hundred meters before firing, so that the splash damage will have a wider range and stronger lethality." ”

When Zhao Ziyi heard this, he looked at Hu Haijun, who was slowly advancing outside the city gate, and a trace of fanaticism flashed in his eyes: "Okay, pass my order, and when the enemy army is three hundred meters away from the city gate, launch it." ”

Lin Ji and the person in charge took the order and left.

After entering the range of 300 meters, Hu Haijun changed his defensive posture, and under the protection of the shield in front, he stretched his bow and pulled arrows, and in an instant, dense arrows shot at the city gate.

The people on the city gate had to dodge the arrows that broke through the air, and for a time the defense of the city was much weaker.

Just when the Hu Hai army was ready to rush to the city gate under the cover of arrows, the change happened.

A large boulder weighing ten catties suddenly fell from the sky, smashing Hu Hai's head and bleeding, and his brain splashed everywhere! Even if you are lucky enough not to be hit by the big boulder, along with the big boulder, there are countless gravels, with full power, smashing the Huhai people screaming and miserable!

At this time, the shield, in front of the big boulder with strong momentum, appeared to be weak, and Hu Hai's army was defeated and retreated for a while.

The one who caused this kind of power was the trebuchet that Mu Qingli had proposed!

After Mu Qingli described the general operating principle and appearance of the trebuchet to Lin Ji, he was busy planting and clearing the wasteland, and Lin Ji really lived up to expectations, and through repeated research and experiments, he finally produced three trebuchets with different ranges but full of power. Today, it was the first time that these trebuchets showed their power on the battlefield!

The attack on Qi'an City this time was the Huhai Qiongzhou defender Herr, seeing that the situation was wrong, he immediately beat the drum and withdrew his troops.

Rao is like this, outside the city gate after retreating, there are still corpses left, under the reflection of the blood-red sunset, shocking.