This time these veterans knew that their speed would determine the life and death of the entire Ji Ling City, and of course they would not neglect them.

By the time Li Chong returned to the open space, twenty catapults and thirty rows named by Li Chong had been erected on the edge of the open space.

In the center of the open space, three kinds of materials are stacked together, each pile is like a mountain, and obviously there are absolutely a lot of them.

He was already an old man, and Li Chong didn't have to politely try his best. Seeing these materials, Li Chong rushed up immediately.

"One nitrate, disulfide and three charcoal." Li Chong said, taking out some of them from the three piles of materials and coming to the edge of the open space.

It was mixed according to the proportions, and Li Chong was really nervous at this time. This gunpowder was the key to the entire strategy. Li Chong was really not sure whether it could be made.

With a thought moving, a small penis print was shot out, carrying a blue-white flame, Li Chong stared at the reaction of the gunpowder he had made.

call!

The flames had just stained the black gunpowder, and a thick smoke immediately emerged, and the gunpowder was ignited instantly. In less than a breath, a full kilogram of gunpowder had been burned.

Success!

Li Chong was so happy that he was about to jump up. The gunpowder experiment was successful, just like suddenly having nuclear weapons in the real world. This was definitely a huge turning point in breaking the current war.

Li Chong is a person who pursues perfection. The first test was so successful. Of course, Li Chong would immediately experiment with the exact recipe.

After continuous testing, Li Chong found that the first test was indeed the most powerful formula, but Li Chong was not busy for two hours. He found that if there was a little more saltpeter in the gunpowder, the power would weaken and the yellow smoke would rise. Compared with the black smoke produced by more charcoal, yellow smoke was even more unaware and distinguished by any unexpected situations around three meters.

This discovery made Li Chong even happier, which had already made his plan perfect.

The only remaining problem now is the time issue. There is still not enough platoons and catapults, but this problem is quickly solved. The problem was solved when two thousand bandits arrived.

It took nearly a night to create five hundred catapults and five hundred rows of cars. Next is the time arranged by Li Chong.

The gunpowder has been developed, and of course the fuse will not stump Li Chong. It only requires some dry and thin bark, which Li Chong easily made.

At noon, Li Chong's preparations did not stop. More than a thousand big trees were dug into hollows. In the five-meter-long trunk, Li Chong installed some gunpowder every ten centimeters, and used stone flakes as barriers in the middle, which could form a continuous explosion.

There are two trunks on each catapult. One is filled with gunpowder, of course, it also contains some sharp stones and smashed weapon fragments, while the other is completely incorrectly proportioned and can produce gunpowder with yellow smoke.

After the thousands of big trees were allocated, Li Chong began to work hard on the simple train he designed.
Chapter completed!