When Liu Zhengyang left, the city defense system was just developed, which is very different from the current city defense system.

Judging from the appearance alone, the urban defense system has undergone certain improvements.

But he didn't see the specific data, and Liu Zhengyang didn't know how capable the city defense system is now.

There is no danger to this advance team at the moment, and Liu Zhengyang doesn't care about watching it for a while.

"It's true that it's the same as last time!"

Poly looked at his tribe attacking the protective cover and silently recorded the frequency and amplitude of the protective cover shaking. It has to be said that under such an attack, the protective cover is still quite stable.

At least the critical value has not been reached.

However, Poly is different from the ordinary royal family. When he comes into contact with human technology, he becomes very addicted.

As a royal family, Poly's memory can be said to be very outstanding. Taking advantage of the opportunity of the invasion of the black soul, he has already developed a complete system of scientific theories and has been learned.

But his approach is quite contemptuous to other royal families.

In their opinion, they have absolute strength and can handle the so-called technology of human beings. Under such a crushing situation, there is no need to learn anything!

Poly's mind was quite tenacious, and he ignored others' objections, while others lost interest after laughing at him a few times.

After all, Poly is a well-known strange guy in the clan.

However, Poly's strength is still very strong, otherwise it would not be valued by Polls.

"Listen to my orders later!"

Poly suddenly spoke.

The people of the Mengtan family frowned, but after all, Poly is the current commander-in-chief. When the protective cover was opened the first two times, Poly was writing something quickly.

He couldn't understand what it was, but the last time he followed Poly's command, he almost broke the damn protective cover.

Now that he heard Poly's orders again, these people hesitated, they still waited obediently instead of attacking randomly.

Poly murmured to himself.

"Resonance! After resonance, it will definitely cause problems with this protective cover!"

Seeing the protective cover shaking under the attack just now, the fluctuation amplitude began to weaken because the attack stopped.

And at this moment, Poly suddenly spoke, "Take it!"

The giants of the Mengtan family waved their fists and smashed them on the protective cover almost at the same time.

The protective cover that was originally about to be calmed suddenly shaking, and the shaking amplitude was even more violent than everyone's attacks together just now!

Although Liu Zhengyang cooperated with the Demon Emperor and handed over the city defense system to them truthfully, these demons only knew some basic usage, and they didn’t even know what the flashing red light on the city defense system meant!

A hint of joy flashed in Poly's eyes. Although the city defense system has not been broken now, the intensity of the shaking of the protective cover is enough to show that his guess is correct!

"Prepare!"

Poly's breathing became a little heavy, his eyes staring at the shaking frequency of the protective cover, and then suddenly waved his hand: "Test!"

After this attack, a stream of blue smoke suddenly emerged from the city defense system protected in the middle of the advance team, and then the lights began to flash continuously.

At this point, even a fool knows that something must be wrong with the city defense system.

"I just knew that human things were unreliable! Brothers, prepare to fight to the death!"
Chapter completed!