Of course I'm going! This is the treasure I've been longing for for a year!

In the research institute next to the city lord's mansion, Song Liyun first looked at the palm-sized thunder that had been successfully developed earlier!

The iron cylinder was oval-shaped and had a safety pin and a pressure ring, just like the hand grenade she remembered.

Old Master Yu said with delight, "Young Madam, these palm thunderbolts can explode within five breaths once they are thrown out."

We've already tried it; even a radius of half a meter around the blast point will be scratched by metal shards!

He tried tying a sheep to the side; when the grenade exploded, the sheep was still alive, but its body was covered in cuts from metal shards, bleeding profusely, and it eventually bled to death.

Song Liyun silently calculated in her mind, then smiled and said, "Old Yu, you've worked hard. At this rate, how many can you make a day?"

In truth, these grenades are less lethal than arrows.

The explosion radius of a hand grenade is half a zhang in diameter, which is the distance between two horses.

Moreover, even a human throw only reaches ten meters, and it still results in scratches.

The range of an arrow is ten zhang, or thirty meters, which is three times that of a hand grenade. Combined with the speed of a horse, it can reach the target in an instant.

Moreover, grenades have a ten-second delay, so in a one-on-one situation, grenades may not necessarily win.

However, every coin has two sides, and each has its own merits.

The advantage of firearms is that they require less technical skill from the user.

A skilled archer requires ten years of training, plus superb horsemanship, making them one in a hundred.

A qualified thrower only needs three training sessions, or even just grab any daring person to take their place.

The only remaining issue is production costs.

If there are enough of them, even if you let children throw grenades around randomly, they can be used as an elite force.

Old Master Yu held up five fingers: "Young Madam, we can make five a day. Right now, there are fifty in the storeroom!"

Song Liyun clicked her tongue in amazement. The quantity was somewhat small, but as long as it was used well, it could still put them in an invincible position.

After the iron and coal mines were discovered three years ago, Zhao Tinglei sent a large amount of gunpowder to blast the mountains and mine.

Song Liyun's gaze also fell on the gunpowder.

In this era, gunpowder was used for fireworks, tinderboxes, and blasting mountains.

When blasting mountains and breaking rocks, the stonemasons would first use chisels to cut out holes in the rocks, fill them with gunpowder, and then light the fuse.

Without standardized construction methods, everything relies entirely on experience, which is extremely dangerous. A slight mistake could injure someone, so it should only be used as a last resort.

Song Liyun then ordered the development of better gunpowder and hand grenades.

As for guns... that won't do. Without refined iron and precision machinery, even if you made one, it would explode. It would just be a fire poker.

This time, Yu Laowan asked her to come and see the experiment not with hand grenades, but with two landmines.

Made of porcelain, glazed with celadon, and filled with gunpowder, the bamboo tube could ignite it.

Because it resembles the fruit of the caltrop, it is also known as fire caltrop.

The truck that Lin Qingyuan brought this time contained, apart from some basic living supplies, several large carts of specially made ceramic jars and gunpowder bamboo tubes.

After more than a month of repeated adjustments, it is now complete.

In a depression outside Mida City, Old Yu had his men carefully bury the ceramic jar in the pit, covering it with soil and pebbles.

The sheep were driven over and trampled over, but there was no movement at the place where the pottery jar was buried.

Song Liyun looked at Old Yu with a solemn expression.

Old Yu explained, "The sheep aren't heavy enough; these landmines are for people and horses!"

Next, a herd of enraged bulls charged past, making two loud "boom" sounds.

Hundreds of meters away, Song Liyun could clearly see the result through her binoculars; the scene was bloody, but it also signified success.

Yu Lao's men rushed over to inspect the two cows, which had been fried into a pile of mangled flesh.

Song Liyun then asked Old Yu, "How many landmines can you make each day?"

Old Yu blinked but didn't speak. Wan Youyou, who was holding her son and hiding in the trench, said, "I'm fine!"

Old Master Yu said decisively, "We have ready-made ceramic jars and bamboo tubes. As long as the gunpowder ingredients from Madam Wan's side can keep up, we can make dozens a day!"

"good!"

Song Liyun felt a great weight lifted from her shoulders; with these things, her stable life would be more secure.

Most merchants have returned to their hometowns, and the city has become much quieter, with only a few horses galloping by.

The only lively place was the large windmill by the river.

The river is now beginning to freeze, and the tireless axles, propelled by the strong winds, are striking the water even more powerfully, pumping water into the underground channels that flow into the city.

Snowflakes and splashing water droplets condense into ice shells on the surface of the tall windmills, forming icicles and icicles that shimmer and sparkle under the sunlight.

Compared to the Rainbow Bridge in summer, it presents a different kind of magnificent sight, attracting people from various tribes to come and worship again.

Wan Youyou was busy at the research institute, while Song Liyun was playing chess and reading with her maids in the warm pavilion.

While taking care of Wan Niangzi's child, Yun Niangzi and Yu Quan were also making underwear for Song Liyun.

Everything seemed peaceful and harmonious, but Song Liyun was somewhat absent-minded.

Zhao Tingduo has not yet replied.

While it's true that sometimes the absence of news is a good thing, the battlefield is a place where swords have no eyes, and there are some suspicious things about those Di people.

"Madam, you've lost!"

Little Leaf's face was flushed; she had won another game of chess.

Song Liyun looked down and realized that she had inadvertently surrounded a group of white pieces into a dead end.

"Haha, Xiao Yezi is getting better and better. I'm sleepy, I'll play again tomorrow!" Song Liyun said, putting down the chess piece.

"Yes, young mistress, please rest."

Xiao Yezi tidied up the chessboard, and Yuquan, who was next to her, put down his embroidery frame and came over: "Does the young mistress want to lie down for a while?"

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