Facing this bronze door, the history of human civilization for thousands of years has been overshadowed.

Even if it is just a bronze door that looks ordinary, the power and technology it shows make the ultimate creation of modern technology like Doomsday Mecha seem so clumsy.

And what the road is long, what I want to prove is whether this bronze door is as hard as he imagined.

If the civilization that created this bronze door really came from ancient times, and even the life of the universe.

Then it will not be destroyed by ordinary human weapons.

If it is destroyed, it only means that this civilization is just like this.

At least it cannot resist the power of the Vulcan cannon.

After all, Lu Yuan and Su Mei are now completely useless to preserve material heritage for mankind.

Anyway, humans are almost gone, so who will show these heritages?

Even if this bronze door is really a precious remains left by alien civilizations.

But so what if it is really destroyed?

Could it be that Lu Yuan still needs to protect and collect this bronze door like an archaeologist, or worship it as a miracle like a primitive man?

Lu Yuan wanted to know more about what was behind this bronze door.

"Stand farther away." Lu Yuan said to Su Mei.

After a brief thought, Su Mei had already agreed with Lu Yuan's approach. After all, this bronze door shocked the two of them a bit. The key now is to see whether this bronze door can withstand the bombardment of the Vulcan cannon. After all, the main purpose of Lu Yuan and Su Mei came here is not to see this bronze door.

Lu Yuan had already learned about the bronze door here from Roland.

The most important thing is how did the expedition disappear? And why did this bronze door cause such great mental trauma to Roland that he didn't want to recall it any longer.

At least from now on, the Roland expedition did not rely on the destruction method after entering the Bronze Gate.

After Su Mei retreated, Lu Yuan looked at the huge bronze door in front of him and pulled the trigger of the Vulcan cannon. While the muzzle was rotating, the Vulcan cannon bullets with a tungsten steel core instantly poured on the bronze door like raindrops, splashing countless dazzling sparks. It was the metal light formed by the collision and attacking of these bronze bullets. The maximum firing rate of the Vulcan cannon is 14,000 rounds per minute. Of course, Lu Yuan did not carry so many bullets, but even so, Lu Yuan's Doomsday mecha had 3,600 bullets.

At this time, in less than half a minute, Lu Yuan wiped out all his ammunition.

Only a pile of shells were left.

"The next time is the time to witness the bronze door." Lu Yuan said quietly.

Su Mei nodded with a solemn expression.

There was a large area of ​​gunpowder in front of me.

The light is refracted in the smoke of gunpowder, making it impossible to see what is happening in front of you.

The advantage of gunpowder is that it also contains oxidizing agents and combusting agents, so it can be ignited and emitted without oxygen.

After Lu Yuan decided to launch an attack on the bronze gate, he never thought about tolerance or temptation. Since he started, he would definitely do his best. Even if he did not use a more powerful super conventional weapon like a missile, it was more than enough in terms of the power of the Vulcan cannon.

Lu Yuan and Su Mei stood there, slowly waiting for the smoke to dissipate, and the dust settled.

"What kind of result do you hope for?" Su Mei asked.

Lu Yuan was stunned: "Probably, I don't know either."

"I hope that there is a broken wall full of bullet craters in front of me, and my saturated shooting completely destroyed this bronze door."

"But at the same time, I want to see a mirror-smooth bronze door."

"My attack does nothing to it."

"This is a door that transcends human imagination and technology."

"Similarly, we will lead us to find hope for the future of the earth."

Su Mei nodded and said nothing. The two of them waited together for the fog to finally dissipate.

But when the smoke gradually dissipated, Su Mei gradually realized something was wrong: "The road is long, look."

She reminded Lu Yuan, and her voice was incredible: "The bronze door, the bronze door is shining."

Of course, Lu Yuan saw it too.

In the smoke formed by gunpowder, you can see a faint light source emerging at the end of the smoke, and the light source is becoming hot and bright little by little.

Almost through the smoke, it reached the retina of the two people and even in the pupils.

And in the next moment, all the smoke in the entire field of vision dissipated, and Lu Yuan and Su Mei saw everything ahead.

It is a complete, mirror-smooth bronze door. The bombardment from a long way before knocked down some mud and moss covered on it, but it did not cause any damage to the bronze door itself.

At this time, the entire bronze door was emitting a strange light blue light. At this time, the two people confirmed that the material of this door was not bronze, but something almost like jade, and of course it might be a synthetic substance. In short, it can be confirmed that it is extremely hard. Even the tungsten bullets of the Vulcan cannon hit it, but did not cause any damage to it. Just like an ultrasonic dishwasher, it can only wash away the dirt and oil stains on the dishes, but it cannot cause any damage to the bowl itself.

Although I feel a little unwilling to say it, it may be true.

That was Lu Yuanqing's attack before, just took a hot shower for the bronze door.

It has washed away the geological traces left by several tens of thousands of years, or even hundreds of thousands of years.

"The road is long." Su Mei continued to say incrediblely: "Look at those star maps."

“Those star maps.”

“They are moving.”

Lu Yuan could of course see that in front of them, the previous Vulcan cannon guns and bullets gave the bronze door a comfortable hot shower, and seemed to have also made it strangely filled with energy.

If simple mechanical kinetic energy can also be charged.

Now, in front of the two people, the top of the bronze door was the Milky Way star map that I had seen before. At this time, the four spiral arms of the Milky Way began to slowly rotate in the field of view.

The solar system also began to operate. The eight major planets, various dwarf planets and the Kuiper belt asteroid belt began to rotate slowly, not just the 2d plane, but towards the deeper part of the bronze door, in the form of 3d.

All of this has long exceeded Lu Yuan's perception, and Lu Yuan looked down at the bronze door and saw something even more incredible.

I haven't seen those before because they are all blocked by mud and moss.

And now, everything is clear.
Chapter completed!