The artillery behind the simple earthen wall has been erected, Qian Bangchen took a few backbones to personally measure the range, and after conducting two test firing of solid bullets, another door fine-tuned the elevation angle, loaded the explosive bombs, and waited for an order to open up the artillery bombardment. At present, those who can be relatively proficient in the technique of falling off are still the expertise of three or four backbones such as Qian Bangchen. They relied on dozens of solid shells to test the door, and only then did they find a little way.

Behind the artillery position, two wooden carts were also prepared, with two large wooden boxes on them, heavy and sturdy, filled with gunpowder that had blasted the city gates, and covered with tarpaulins. Dozens of heavily armored sword and shield soldiers were already ready to go, their mouths and noses covered with wet cloths, ready to cover the two demolition vehicles as they advanced through the city gate.

Several generals rushed to see it, and Liu Zhen, the king of Qingyang, looked still angry, and opened his mouth to report: "Your Highness, the last general has already sent someone to shout under the city, and the Annan soldiers ignored it and insulted them. ”

"Do not live for yourselves, but teach them a good lesson in a moment." Zhu Yongxing smiled and comforted, disappreciating in his heart, this battle has not been fought yet, persuasion is just a preparation, how can it be so easy?

The sound of drums and trumpets first sounded from the direction of the north city gate, and then the drums and trumpets of the Ming army in other directions should be harmonized, and the defenders of Annam on the city wall increased, some held guns and waved knives, and some were placing rolling logs and stones, which seemed very nervous.

"Boom", a thunderous explosion in the distance, causing Annan soldiers to look up at the sky, although there are some clouds, but this thunder is a little strange.

"Boom", "boom", thunder sounded one after another, black smoke rose from the direction of the far north city gate, and the explosion shook the ground slightly.

Although the main attack was in the east, Zhu Yongxing still left three guns at the north gate and played a trick to attack the east in the north. It seems that the north gate of the city seems to be more heavily guarded, and there may be Annan's senior officials, and if they happen to be killed, it will exacerbate the chaos of Annan's generals.

"Let's get started!" Zhu Yongxing waved his hand and ordered.

Small green flags were raised on various gun emplacements. Shows that the angle of the artillery has been corrected. Can be launched at any time. Qian Bangchen waved the yellow command flag and signaled the gunners to prepare to ignite and fire. Qian Bangchen didn't expect every cannon to hit the target directly, but with the same charge and angle, at least the flight distance of the shell and the landing point could be guaranteed.

The red flag was raised and waved heavily in the air. Suddenly, twenty cannons made a dull noise. Flames and white smoke erupted, and the cannonballs flew into the air, over the earthen walls, and towards the enemy city.

More than ten seconds later, deafening explosions rang out one after another, bricks and stones flew everywhere at the head of the city, and smoke and dust rose high, obscuring people's vision.

The flowering shells fired by the Western twelve-pounder cannons were usually filled with about 900 grams of black powder, while the shells fired by the sky-bombardment cannon weighed five or ten catties. Sixty or seventy percent of the weight is all gunpowder, which is obviously much more powerful than that. The disadvantage is that the cannon wall is thin, the propellant is small, and the firing range is short.

At this time, Zheng Hua, the "master of the art of war" of Annan at the north gate, was groggy, deaf in both ears, and had wounds on his body that had been broken by gravel. Blood was pouring all over his face. The confident and calm appearance just now is gone, and even acquaintances can only identify themselves from their clothes.

A few loyal guards carried their master on their backs. Flee from the city in panic. There was still smoke from the two pitch-black craters on the city wall, and the craters were scattered with weapon stumps, and beyond that, there were many Annan soldiers who were bleeding from their ears and noses and were knocked unconscious. Because the Annan soldiers at the head of the city were not prepared, the dense formation of defending the city invisibly increased the power of the cannonballs several times.

And the Annan soldiers, who were not killed or injured, were stunned by the violent explosion, and they were like a pot of porridge in the thick smoke. Even the soldiers who were wounded by the explosion paid no attention.

"I'm going to fall, run!" Amid the exclamations, the simply built city gate tower crumbled in the smoke, and there were fires in several places.

The five sky-shattering cannons under the city were constantly adjusted, firing unhurriedly like crumbling beans. Some shells landed outside the city, some on the city, and some flew over the walls and exploded in the city. Under the constant tremors of explosions and shock waves, the fragile city gate tower finally collapsed.

The chaos was intensifying, but it was still far from being dispersed, and several Annan officers, surrounded by cronies, shouted hoarsely, brandished their weapons in their hands, and restrained the chaotic soldiers. The young men in the city who were temporarily recruited to defend the city were even worse in psychological quality, and those who did not die were also frightened, and took advantage of the chaos to flee more than half of them, huddled in their own houses, and refused to come out again.

At the east gate, before the smoke cleared, Zhu Yongxing had already given an order. Dozens of Ming soldiers raised shields or pushed carts, quickly rushed to the city gate, and then disappeared in the smoke and dust.

Obviously, the Annan defenders at the east gate were blinded by the salvo of these twenty sky-bombing cannons, and they couldn't see the Qingming army's attack routine in the smoke and dust. Ten minutes later, dozens of Ming troops had completed their tasks, emerged from the thin smoke and dust, and ran hard one by one.

The fuse is long enough, you don't have to run so suddenly, right? Zhu Yongxing couldn't help but grin and shake his head as he watched these heavily armored Ming soldiers run away.

The smoke of gunfire slowly dissipated at the head of the city, and the effect of the round of shooting just now was fully displayed in front of him. A corner of the mounds had been cut off, and the battlements had been mutilated, and it was not known whether the road had been ignited by boiling oil or wood, and several flames had erupted. And the figures of the Annan soldiers who were originally densely packed are no longer visible, oh, and a few guys with probes probing their brains emerged from behind the city wall and looked out.

Guangguo Gonghe Jiuyi was not awarded the army, but assisted in the command as Ma Bao's deputy, while several of his cronies, such as Li Chengjue, Lei Zhaosheng, Huang Yuancai and others, were arranged separately by Zhu Yongxing, each commanding a thousand-man team. Now, facing the tragic scene after the bombing of the city gate, they all witnessed it for the first time, and they couldn't help but open their mouths wide, their eyes wide open, and they didn't blink.

Zhu Yongxing had already turned his gaze to the city gate hole, the two carts had been removed from the wheels, side by side against the city gate, presumably the soldiers would not forget to nail the carts to the ground with iron drills, right? Two hundred catties of gunpowder is enough to blow up the city gate, even if it is blocked behind the city gate, right? It's just that I don't know if the concentrating charge of Lu Dao has any effect, anyway, it's better than nothing, and the right to test it. Well, it's time to cover your ears.

Without waiting for the Annan soldiers in the city to make adjustments, a deafening explosion rang out again, and the smoke and dust in the sky covered the city gate tightly, and nothing could be seen.

The Ming troops in the array all raised their heads and looked at the pillar of smoke that had been rushing towards the tower, and then a rain of rubble fell, and a large amount of smashed brick dust drifted in the air, and even fell on the heads of many Ming soldiers. (To be continued......)