In Silver Dragon City, the main person in charge of the town is Niya, but it is the unknown Li Xian who is really in charge.

There is no other reason!

Because the Silver Dragon City was built by Li Xian himself.

The design drawings of Silver Dragon City, the programming of the brain and the actual operation of the nanorobots are all done by Li Xian.

In this Silver Dragon City, the installation of every piece of equipment, the placement of each turret, the configuration of each machine gun port, and the angle of the fire net...... And so on and so forth, all of them are in Li Xian's grasp.

Because of this, no one is more familiar with the defense of this city than Li Xian.

Niya is well aware of the characteristics of suspicious people and no doubts, and directly handed over the control of the city to Li Xian, so that Li Xian can do his best, while Niya herself has done a good job in the personnel work of the central dispatch.

The two were originally old teammates of the Blood Fang team, and they had a tacit understanding in cooperation, and they relied on each other at this time and played well together.

If it was just a tacit understanding between the two, it would definitely not be enough to resist the enemy's attack.

In Silver Dragon City, there are also thousands of human slave warriors cultivated by Song Ziyu and an equal number of zombie tribes that can be mobilized.

These vital forces are the confidence of Niya and Li Xian.

Of course!

Li Xian's greatest confidence is still Silver Dragon City.

This city, which was built by nanobots using cutting-edge technology, was exchanged by Song Ziyu from Xihe for a large amount of contribution points.

It was precisely because of this city as a shelter that Niya and Li Xian were able to maintain their composure and composure under the sudden attack of the enemy.

Under Li Xian's operation, Silver Dragon City's defense was impregnable.

Heavy gunfire plowed the ground in front of it, and with the help of the dim light of the ground, the mutilated corpses of the slain enemies could be faintly seen.

"What are you kidding, really think Vulcan cannons are vegetarians? This thing can be put in the refrigerator by an elephant!" Li Xian operated the light brain in front of him and brought the role of the artillery defense system on the city wall to the extreme.

The operation panel in front of him is like a beach landing game, with a clear strike scene and the amount of ammunition that is automatically loaded, as well as the silky commands like a body and an arm, all of which make Li Xian's battlefield command like art, and also make this guy even have the leisure to joke with Niya.

"Don't be careless, after all, the opponent is a traverser like us, and it shouldn't be possible to only have these two brushes."

Niya is far less optimistic about the battlefield situation than Li Xian.

As the saying goes, knowing oneself and knowing the other side can not be defeated in a hundred battles.

Realizing the identity of the enemy, Nia felt that the frontal attack must be a feint.

But Li Xian obviously didn't have this sense of crisis, he just said lightly: "Miss, don't worry, with the defense system of Silver Dragon City, no one will be able to do anything if they come......

Before the words fell, the light brain in Li Xian's hand sounded an alarm.

Li Xian looked at it intently, and then sneered, "Damn guys, you actually came here to make a move! The eastern wall that these guys feinted to attack is actually preparing to climb over the western wall!"

Nya immediately said, "Fortunately, I still have a reserve in my hand, so let them go up?"

"No!" Li Xian sneered, "I had already guessed that there would be such a thing, so the western city wall had already been prepared."

Li Xian, who was confident, made a few operations with his brain, and then the entire western city wall immediately burst into terrifying blue light!

Seeing this scene, many people stationed on the city wall were dumbfounded.

Niya also showed an incredulous expression: "This is ......."

With the terrifying thunder and lightning, all the enemies who had climbed the western wall were scorched and scorched, and they rolled down the wall one after another, falling to pieces.

"I have built-in shock capacitors on the city walls, and these electric panels that accumulate solar energy during the day can burst out of electricity as high as one million volts in an instant, and Pikachu will have to be a stupid mouse when he comes." Li Xian said to Niya in general.

"How did you come up with that?"

Niya

was shocked by Li Xian's genius concept, and couldn't help but ask.

Li Xian sighed and said, "Actually, this hand is not prepared to guard against humans."

In the past, when the Silver Dragon City was first built, this city was far from the scale it has today, and it was not equipped with these high-tech means.

Then Silver Dragon City suffered a surprise attack by the Gangaro clan, thanks to Song Ziyu's bravery, he killed the sneak attack zombies, otherwise he would suffer a big loss.

When the conditions allowed the funds to be in place, Li Xian learned from the pain and came up with such a power grid device.

At the moment, I didn't expect that this power grid has not been used for zombies, but it has made a miraculous achievement!

"Well, my means are okay, right?" Li Xian was not without pride and showed off to Niya.

"Li Xian, it's amazing, I can't see that you're still a scheming general." Niya couldn't help but compliment.

A crisis disappeared in a snap of a finger, and Li Xian felt that he could probably be slightly better than Zhuge Kongming compared to him.

However!

Just when Li Xian was complacent, a change occurred suddenly.

A terrifying cyan sword light lit up between heaven and earth, and then slashed at the western city wall.

Then several cannonballs of no small energy level bombarded the city walls.

The boom is earth-shattering!

The earth shook and the rocks were accompanied by rolling rocks, which almost made Niya and Li Xian roll off the city wall.

When the dust cleared, Nia was desperate to find that the western wall had been bombed into a huge gap.

"Grandma's, thousands of calculations, but I didn't count that there is also high technology on the other side." Li Xian, who had eaten a mouthful of dust, got up from the ground and slapped the gravel on his body.

Niya was also a little annoyed!

I was still careless, knowing the origin of the opponent, I should have been ready to fight a plane war a long time ago.

But I still didn't take it too seriously.

If you can bring the technology of the source world to this world, why can't the enemy?

"Prepare for battle!"

Nia hurriedly gave orders to the generals around her, preparing to meet the attacking enemy.

At the same time, the earth shook and the mountains shook again, and a huge metal mecha rose from the ground in the darkness!

The thing was under heavy artillery fire and launched a brazen attack on the western wall.

In front of this alloy mecha, the city fortifications that Li Xian was proud of were like paper paste, and they were immediately destroyed by the devastation.

As the mechs entered the city, fierce street battles broke out. Look at the book

Although there were already defenders in Silver Dragon City, these human defenders were desperate to find that the enemy they were facing was not just an enemy, but also a large group of mechanical combat units armed to the teeth!

"Humph! It's not just you who have the technology to back you up! Lao Tzu is not a primitive person."

Li Canghai, who was holding a giant sword in his arms, stood on the shoulder of the mecha that was more than ten meters high, and he was like a fairy wind and bones.