"General's Gate, this should be the area where the troops of the entire Jieshi Underground Palace stay, right?"

"Just go in and see," Li Zimu said lightly, raised his feet and walked inside, past this stone gate is a path, and through the path is a platform.

There is a large tripod in the middle of the platform, and at this time there is a raging fire burning inside, illuminating the entire stone platform transparently, and a weapon rack is placed on both sides of the stone platform, and spears and halberds are inserted on the shelves. The stone platform is surrounded by attics, and the base of the platform is about one meter high, and some stone steps have been built.

Zhang Jingyang took out a spear and waved it casually, these spears are all made of fine iron, which are much more precious than ordinary iron guns, but now they are placed here at will.

"Nanku?" Chi Ling looked at the plaque on an attic next to her and said slowly, she still knew these two seals, but she didn't know what to put in them.

Li Zimu walked up the stone steps to the door, gently pushed inside, only to hear a creak and the door opened, there was no candle for lighting inside, Li Zimu held a flashlight and shone it inside, this is an armory.

"Armory?" Zhang Jingyang looked at the furnishings in this and said with his eyes lit up, this entire attic is full of weapons, spears and swords, crossbows, shields, and a whole attic.

Zhang Jingyang hurriedly walked inside with a flashlight, he was still quite interested in these things, this whole room was full of weapons, maybe a few of them were particularly valuable. After all, the spears on the platform outside are all made of fine iron, and these things will not be too inferior in any way.

"Bronze?" Zhang Jingyang picked up a long sword and looked at it carefully and said, this sword is an ordinary sword, and the long swords around it all look the same, at first glance, it is a standard weapon, used for ordinary soldiers, but he is curious, why are these swords made of bronze?

As far as he knew, the use of iron weapons had been widespread as early as the Warring States period, when the weapons used by the soldiers of the Six Kingdoms were all iron, because iron tools were harder than bronze tools and had stronger toughness than bronze tools.

Zhang Jingyang wondered in his heart, most of the ritual weapons are bronze, which is not very strange, but the weapons in this are used by ordinary soldiers at first glance, and they should not be ritual weapons, could it be that the weapons used by these soldiers are backward bronze?

No, even those jack crossbows on the city wall were the strongest configuration at that time, and the spears on the outer shelves were all made of fine iron, but this long sword was made of bronze, could it be that these bronze swords were a little different? Zhang Jingyang immediately understood the truth.

"The long swords used by the soldiers of the Qin Dynasty are indeed bronze swords" Li Zimu nodded and said, unlike the other six countries, the swords worn by the soldiers of the Qin State are all unified bronze swords, in the eyes of most people, the bronze sword is not as good as the iron sword, but the bronze sword of the Qin State is different, on the battlefield of the Six Kingdoms, the bronze sword of the Qin State is not weaker than the iron sword of the Six Kingdoms.

Bronzes can't be made too long, because they are easy to break, but the bronze swords of the Qin State can be made into long swords. Jing Ke stabbed Qin, King Qin walked around the pillar, and Ying Zheng was wearing the bronze sword of Qin at that time, which could not be pulled out for a while because it was too long.

It can be seen that as early as that time, the bronze sword of the Qin State has been improved, a few years ago when the Terracotta Warriors and Horses of Qin Shi Huang was discovered, the bronze sword unearthed inside, was bent forty-five degrees and still quickly restored to its original state, it can be seen that the bronze sword cast by the Qin State not only has the characteristics of strong hardness of bronze, but also has the toughness of iron.

The Six Kingdoms died at the hands of the soldiers of the Qin State.

This sentence is not without any truth, in terms of weapons alone, the bronze sword of the Qin State is already stronger than the iron sword of the Six Kingdoms, and there are also various war weapons developed by the public losers.

And the secret lies in a copper-tin ratio. Four points of gold and tin in one, called the Qi of the halberd. The same is true for bronze swords, which are roughly made of bronze and tin.

Tin this kind of thing, the characteristic is hard, adding it to the bronze can improve the hardness of the bronze, this is the thing that the seven countries know at that time, the tin is more, the hardness of the sword has reached, but it is too rigid and easy to break, the tin is less, the toughness is there, but the hardness is not up to standard.

Everyone knows this, but the smelting technology at that time had not yet developed to the extent that the copper-tin ratio could be changed at will, and at most there was only an approximation, so the bronze ware of the Warring States period was either too easy to break or too soft, and after the popularization of ironware, there was no such concern.

However, the Qin State did not choose to switch to iron, but focused on improving the smelting technology, and finally refined the copper-tin ratio to a degree of roughly six to one, so that the bronze cast had both the hardness of iron and the toughness of bronze.

Not only that, the Qin State also improved the sword at that time, widening and then lengthening the sword body, and the surface of the sword was oxidized with chromium salt, making it bright and sharp. Huaxia invented this advanced technology more than 2,000 years ago, which can be called a miracle in the history of metallurgy.

Therefore, these bronze swords in front of them are actually not ordinary bronze swords, in terms of their practicality, they are definitely stronger than iron swords, and these standard weapons are used by ordinary soldiers.

"The things upstairs should be good things" Li Zimu smiled and said, the ones on this floor are all standard weapons, and this Nanku has a second floor, and the things on it should be good things.

The three of them crossed these weapons and went straight to the second floor, which is much smaller than the first floor, and there are weapons on it, but they are not as random as the first floor, and the weapons on it are all neatly arranged.

Li Zimu glanced at the layout of the second floor, just one room, you can see it all at once, there are spears, long swords, and shields in this room, but they are neatly placed, and looking at the pattern decoration on the weapon, it is much more exquisite than the one on the first floor below.

But Li Zimu's attention was not on the weapons around him, at this time he was looking straight at the last corner of the two-story attic, where there were a few shelves, and the things placed on the shelves were what he was interested in.

"It's ...... Fish intestine sword?" The three of them walked straight to the back, Zhang Jingyang looked at the sword squared on the bracket of the first shelf and said in surprise, the reason why he knew the fish intestine sword was because of the characteristics of the sword body of the fish intestine sword.

And Li Zimu approached these shelves and looked at them, the corners of his mouth rose slightly, there are really a lot of good things here, just the long sword, there is the eighth fish intestine sword in the ranking, the sixth and seventh cadre Mo Ye, as well as the eleventh Gongbu, and the fourteenth Juque......