Before the development of gunpowder in Su Zhen, some results were obtained. At Su Qin's request, some people continued to research better formulas, and some people started to make explosive packs.

Although a few years have passed, several better formulas have been developed for gunpowder, but they still haven't reached the optimal ratio. The gunpowder used to make explosive packs has also been replaced with the latest formula.

A bag of explosives with a length of 20 centimeters and a width of 20 centimeters, with a three-finger thickness, barely exploded a pit 30 centimeters deep and 100 centimeters wide. Although this power is still relatively small, if a lot of explosive packages explode together, the power is still considerable.

The point is that these explosive packs can be thrown out with a catapult, just like throwing grenades. If you get some gravel outside, it will be like a fragment grenade. If you put a sight-ready poison in it, the power is not bad.

Although this kind of explosive package is not very powerful, it can also play a good effect on the battlefield.

Su Qin briefly explained the research on gunpowder in Su Zhen to everyone present, and the power of the explosive bag.

Su Qin smiled and said, "I know you can't understand it if you just listened to it, so please invite you and me to the outside of the hall to test its power."

When Yu Tianheng and others heard the words, they were very curious, and they all turned their eyes to Xueqinghe. Xue Qinghe was also very curious at this time. He naturally knew about Su Zhen's research on gunpowder, but he didn't take it to heart at the time. Now it seems that Su Qin has really made some famous figures.

Xue Qinghe also showed a curious look at this time, and looked at Su Qin and said, "Okay, please trouble Su Qin for leading the way."

Su Qin nodded slightly and smiled: "Just go to the courtyard outside."

With that said, Su Qin stood up first, led the crowd out of the hall and into the courtyard outside.

This yard is quite large, with a length and width of more than 20 meters. It is located in the middle of the alley, and there are many flower beds on both sides with some precious and beautiful flowers planted in it.

Su Qin took out a dynamite bag from the storage soul guide, showed it in front of everyone, and said, "This is the dynamite bag I was talking about. I'm going to light it now. Be careful, everyone. The sound of this thing exploding. It’s still huge."

As Su Qin said, he took out the fuse on the explosive bag, then lit it with a fire fold, and threw it into a flowerbed five meters away.

Su Qin didn't want to hurt these beautiful flowers, but at present he was the only way to show everyone the power of the explosive bag.

After listening to Su Qin's words, everyone subconsciously stepped back. Ye Lingling, Shui Bing'er and other girls hesitated slightly and still covered their ears. Xue Qinghe hesitated a little, but also slightly protected his ears with his spirit power.

Others like Yu Tianheng didn't care too much. How loud could the sound of the gunpowder used to make fireworks?

The lead burned out quickly, and then accompanied by a loud bang, the flower bed centered on earthen explosives, the flowers in a radius of 100 cm were blown away, leaving a not shallow hole in the same place. The flowers in the distance were also frightened and bent over, and at the same time a cloud of smoke rose in place, and a pungent smell emerged in the air.

Ye Lingling and other people who had taken precautions in advance were not too frightened, but they had a new understanding of the power of this explosive package, and they were a little curious about the novel things.

Yu Tianheng and the others were all startled. They looked at the flower bed with a little surprise. They didn't expect the explosion of the thing to be so loud and the power to look pretty good.

Xue Di and Zi Ji have basically been by Su Qin's side all the time. They have seen dynamite bags before, so they didn't have much expression at this time.

However, people like Xueqinghe and others who saw this explosive package for the first time were a little shocked. They originally saw fireworks as a pastime, but they could still be so powerful. How could this not surprise them?

Xue Qinghe's curiosity about Su Qin has deepened a bit. Su Qin is really a treasure boy, and he can bring her many surprises every time.

Ning Fengzhi took a deep look at Su Qin, and was also surprised by the dynamite bag, and couldn't help but start to guess in his heart how many things Su Qin had hidden.

The two elders who pierced the blood also had surprised expressions on their faces, and they raised a little vigilance against Su Qin. Su Qin was a bit evil. This person can only be a friend, not an enemy. If you become an enemy, you must unreservedly use all your strength to kill him as soon as possible, otherwise the consequences will be disastrous.

Seeing this, Poison Douluo's pupils shrank suddenly, and at the same time he raised his vigilance against Su Qin, he also became curious about him. At the same time, Poison Douluo guessed in his heart, does Tang San know this?

Yu Feng asked with excitement at this time: "Su Qin, how much is there in this explosive bag?"

Su Qin smiled and said, "When I returned from Tiandou City last time, all the 30 cars I brought were this. Each car had about 300 packages."

The surprised expression on everyone's face became a bit rich when they heard this. They didn't expect that there were thirty cars. How much did Su Qin do?

Xue Qinghe glanced at Su Qin deeply, put away the surprise, and smiled: "Su Qin, you brought me a lot of surprises."

Su Qin smiled, didn't say anything, it was acquiescence.

Xue Qinghe returned to the hall with everyone, glanced at everyone present, and asked, "Do you have any questions about Deputy Marshal Su's siege strategy?"

Everyone looked at each other when they heard the words. They had no problem with Su Qin's siege plan. Now the more curiosity is on the explosive bag.

Ning Fengzhi hesitated for a while, and asked, "Su Qin, how do you plan to use the explosive package?"

Su Qin smiled and said: "Of course, the explosive package was thrown on the city wall to attack the soldiers on the city wall. It can also be used to blast the city wall. Of course, if it can be used, it would be better. These explosives are left to attack Xingluo City at the end. It should have a miraculous effect when used again."

Su Qin paused for a while, and continued: "But we can also quickly move towards Xingluo City after we have won the Acropolis quickly, without giving them time to prepare, this is also possible."

Xue Qinghe was silent for a while, then looked at Su Qin and asked, "Are there many things in Su Town?"

Su Qin said: "Now there are only 30 cars that I brought last time, and they will be gone when they run out. There should be productions in Su Town, but not too many. I have brought all the productions over the years."

Xue Qinghe hesitated for a while and said: "If this is the case, then use less for this attack, no more than ten carts, and save the rest for the attack on Xingluo City. After capturing the Acropolis, rush to Xingluo City!"

Xue Qinghe had already spoken, and everyone had no opinion, and they nodded in agreement.

Immediately everyone discussed a specific plan to attack the Acropolis, and then dispersed.

The next day, after the army reorganized and cleaned up, it quickly moved towards the Acropolis.

After spending more than half a month, the Heaven Dou army came to the outside of the Acropolis, performing repairs, and waiting for the battle at night.

Ever since Su Qin led the Su family army to take the first city with a night attack, the Heaven Dou army seems to be more inclined to attack at night.

No matter which one of the three empires, the night defense ability is worse than the daytime. Of course, the offensive ability of the offensive team will not be too good, but the night attack can take advantage, which is still possible for the offensive team.