Like the complete deployment in Xiapi County, Gao Changgong also used this trick in Xuzhou City, dividing his troops out of the city with great fanfare, leaving only a small part of the troops to defend the city, giving the opponent an effect of making it easy to attack the city, and because Xuzhou City and Xiapi County are extremely important military points, sending troops to each other to reinforce will not arouse the suspicion of the opponent!

But in fact, these troops who went out of the city did not go far, but just ambushed near the outskirts of the city, and then waited for the opportunity, and after the battle began, they joined forces with the defenders in the city and attacked the opponent together!

Therefore, Gao Changgong, who was standing on the wall of Xuzhou City, saw that the Chen army, which had just arrived in Xuzhou City, did not rest, but immediately surrounded Xuzhou City and prepared to attack the city, which made Gao Changgong sneer and said: "Although the soldiers are noble and fast, they can't launch a siege attack so anxiously, how can they not be defeated if they are reckless and light the enemy in such a battle!" Pass my order, when the Chen army completes its deployment and prepares to attack the city, immediately let Zhang Dabao take the artillery troops outside the city and attack fiercely behind the back of these Chen troops! ”

That's right, this Zhang Dabao is that Xiao Yao's former subordinate, Zhang Dabao, the son of Zhang Dazhao, the general of Chen Guo's chariot cavalry! After betraying Xiao Yao and betraying Chen Guo, Zhang Dabao could only follow Gao Changgong to Qi State, even if his father died of illness, he couldn't go back to see him for the last time!

Originally, Gao Changgong didn't have a good impression of this kind of traitor who betrayed his boss and betrayed the country, but because Gao Changgong captured a large number of Xiao Yao's muskets and artillery after defeating Xiao Yao, and wanted to use these extremely strange weapons for Gao Changgong like Xiao Yao's artillery battalion, Gao Changgong could only reuse this Zhang Dabao, who had been guided by Xiao Yao and knew how to use these firearms!

Therefore, Gao Changgong deliberately formed an artillery unit with Xiao Yao's artillery battalion as a template, and Zhang Dabao was appointed as the commander of this artillery unit!

And Gao Changgong also knew that if he wanted to use these powerful artillery muskets, the black, black powder called black powder was the most critical existence, but Xiao Yao was the only one in the world who knew how to mix black powder, so Gao Changgong gathered a large number of skilled craftsmen, literati and warlocks, looking for ancient books, looking for alchemists, studying the powder in fireworks and firecrackers, etc., to study from all aspects, hoping to crack the formula of black powder!

Recently, he has made a major breakthrough, that is, he has finally determined the composition of black powder, that is, using saltpeter, sulfur and charcoal, mixed according to the ratio of one to two to three, you can make this kind of black powder that can burn violently!

It turns out that this kind of black powder that I have been thinking about and dreaming about day and night, its formula is so simple, the materials are so ordinary, and the production process is just a mixture of three materials together! I always thought that this black powder was made of precious materials, and it could only be made through various complicated processes!

But not long after Gao Changgong was happy, the problem arose again!

Because he found that the black powder he made could not exert the same great power as the black powder made by Xiao Yao, the effect was similar to the powder taken from the fireworks and firecrackers, and the range of these guns was only half of Xiao Yao's when using the same weight of black powder!

In fact, the reason is very simple, that is, these people summoned by Gao Changgong still don't know how to purify these three materials of black powder, and they don't know how to granulate black powder, so the power of a bunch of medicinal powder made from these three materials mixed with a large number of impurities is far less powerful than that made by Xiao Yao, and even inferior to the medicinal powder taken out of the fireworks and firecrackers produced by General Firm!

This is also the reason why when Wei Xiangyuan and they were lurking in Jinling City, they asked Yinhai Commercial Bank to help them buy a large number of fireworks and firecrackers, and only with these gunpowder made by Xiao Yao can they exert the greater power of artillery and muskets!

But now in the face of Chen Jun's attack, Gao Changgong can only be a dead horse as a live horse doctor, during this time, he has made a large number of inferior black powder, although the effect is not as good as Xiao Yao's, but it is very simple to exert greater power, only need to increase the amount of black powder! 117

And according to Gao Changgong's plan to break down one by one, firearms will be a decisive key weapon!

On the side of Xiapi County, Wei Xiangyuan relied on the musket bomb in his hand, learned Xiao Yao's tactics, and successfully assassinated Xu Jingcheng in the formation of the Eastern Route Army! And now on the side of Xuzhou City, Zhang Dabao's artillery unit will also be the secret weapon of Gao Chang to deal with the 30,000 besieging army!

Zhang Dabao said to Gao Changgong that when Xiao Yao was training the artillery battalion, he once told them that the most suitable tactic for firearms is to use movement to control stillness and attack the opponent while moving, so that the opponent cannot hit you, but you can hit the opponent!

Therefore, Gao Changgong sent Zhang Dabao to lead the artillery unit to leave Xuzhou City in advance with dozens of artillery pieces, and then when the Chen army set up a formation and prepared to attack the city, he launched a fierce artillery bombardment behind them!

And because during the siege, in order to climb the city wall, it is necessary to constantly attack the city wall, so a large number of soldiers must be gathered under the city wall, so that these soldiers who stand in dense positions and the climbing equipment that cannot be moved at will become the best target for artillery!

So now Gao Changgong is very calm to watch Lu Guangda arrange the tasks of various troops in an orderly manner, some are the main force of the siege, some are assisting in blocking other city gates, some are responsible for vigilance and defense, and some are mobile reserves!

The 30,000 army immediately set up a formation, set up the tools to attack the city and climb the wall, and then just waited for an order to launch an attack on the gate of Xuzhou City!

But the Qi army guarding the city wall did not react, even if Chen Jun had entered the range of his bow and arrow, he did not release the arrow, but just looked at Chen Jun under the city wall coldly, which made Lu Guangda even more puzzled, and suddenly felt uneasy in his heart!

There must be a demon when things go wrong, is this a trick of Gao Changgong? Lu Guangda thought secretly. But suddenly I heard a loud noise behind me, and then I heard all kinds of screams from the soldiers around me!

Lu Guangda turned his head to take a look, but found that the troops in charge of defense behind him had fallen into chaos, and there was no defensive formation for a long time, but in the woods not far away, there was a force attacking him with those fiery and smoking weapons!

It's the artillery muskets, and the firearms used by Xiao Yao's infantry battalion! Lu Guangda was shocked, and at the same time shouted in his heart!

As a veteran of the Chen Army, Lu Guangda had certainly seen the power of Xiao Yao's firearms, but at that time, out of the dignity of the so-called veteran, he was very disdainful that he didn't understand these strange and ingenious things, but he was still shocked that Xiao Yao easily broke through Shouyang City with only these weapons!

So now seeing that the Qi army is also using these firearms to attack his own army, Lu Guangda, who has been on the battlefield for a long time, is also frightened and at a loss for a while!