Daqiang landed steadily on the city wall, which was about three meters wide and could barely be stepped on.

Huang Zhao jumped down from Da Qiang's head and walked towards Commander Wang Jiaobin.

He reached out and shook hands firmly with the other person, saying, "Young friend Chen, why didn't you let me know beforehand that you were coming again? I would have prepared a special treat for you."

"Commander Wang, you're too kind. I just happened to be passing by and thought I'd drop by to see an old friend."

As he spoke, Huang Zhao turned to look at Xiang Yang, who was deep in thought, and asked, "You've already broken through to level four. How does it feel?"

Xiang Yang looked grateful. "It's mostly fine now. After reaching level four, my mental strength has improved, and all the previous problems have been resolved."

"According to the professors' assessment, psychic abilities are quite dangerous, not only because of external threats, but also because of the risks associated with using one's own abilities."

Huang Zhao had some guesses about their judgment, but didn't say much.

Huang Zhao said softly, "Fully expand your mental perception area. I need to confirm something."

Xiang Yang looked at Wang Jiaobin, and after the other nodded, he began to activate his mental perception area.

Centered on Xiangyang, a mental perception area of ​​approximately 350 meters appeared in Huang Zhao's mind, covered by his mental perception area with a radius more than 10 times larger.

The radii differ by a factor of 10, but the areas they cover differ by a factor of 100!

By observing Xiangyang's mental perception area, Huang Zhao gained a clearer understanding of his own special abilities.

At the same level, his mental perception area is twice as strong as other mental ability users!

The strength of his mental power after the mental transfer is comparable to that of other mental ability users of the same level.

"Okay, thank you for your cooperation."

Xiang Yang was almost completely unaware of Huang Zhao's secret observations.

Although both are mental beings, Huang Zhao had already broken through to level six, enough to crush everyone present.

At the same time, Huang Zhao also observed some areas within the military region that could not be penetrated by mental perception, which aroused his curiosity.

Although it's possible to penetrate if you force it, Huang Zhao felt that the other party might notice.

"Commander Wang, it seems you've made some breakthroughs in your research on materials that block mental perception?"

Wang Jiaobin's smile remained unchanged, and he did not hide anything from Huang Zhao.

"Thanks to you, after solving the problem of the mutated kapok tree, we were able to extract special materials from its trunk and successfully develop it."

As he spoke, Wang Jiaobin was somewhat surprised, because he had not noticed Huang Zhao's probing.

Those specially made materials that shield against mental perception were developed with Xiang Yang's assistance.

Any mental probe will trigger an alarm, alerting those inside the building to take precautions to protect themselves mentally.

Since they have materials that can shield against mental perception, they naturally developed equipment to defend against mental attacks.

Since they couldn't be too obvious about their precautions when meeting Huang Zhao, neither of them wore any protective gear.

Huang Zhao, however, became somewhat interested in the material and planned to bring it back to the shelter for use.

Although the shelter's defenses are made of titanium alloy mixed with thick bulletproof glass, they are sufficient to protect against earth-type and metal-type ability users.

However, it remains defenseless against spatial and mental attacks, rendering it virtually useless.

If he can shield his mental perception, then others besides him will also have some resistance against attacks from mental ability users.

Thinking of this, Huang Zhao didn't beat around the bush and asked directly:

"I don't know if developing these materials is difficult, but I'm willing to exchange them for 100,000 level zero energy crystals."

Upon hearing Huang Zhao's words, Wang Jiaobin, who had originally intended to send out some materials, immediately swallowed his words.