Su Ren's exploration did not end here.

Su Ren took out a few more steel balls from the space.

He aimed his slingshot at the car roof cover downstairs and fired four steel balls in succession, hitting different car covers respectively.

"Dang-dang-dang--"

The crisp sound of marbles falling on the car hood was particularly clear in the night.

After hearing the sound, the zombie wave still paused for a moment.

Then, these zombies sent out doubled "scouts" to investigate the places where the noises were made.

"They have a sense of numbers." Su Ren came to this conclusion.

Su Ren took a deep breath to calm down.

"It seems that this AI is more complicated than I thought."

It's not the kind of monster that just knows how to attack targets without thinking.

But this little information is not enough.

In order to obtain further information, Su Ren continued to conduct further tests.

He fired another steel ball at the car further away from the zombie group, on the west side.

Due to the different parts of the hit, it made a different sound than before.

The zombie wave still paused, and then the zombies that originally approached the vehicle on the east side continued to approach.

Two more zombies appeared in the zombie wave, and a total of three zombies were exploring the Honda car on the east side.

"Um."

The behavior of the zombies once again proves that they can cooperate and have the characteristic of number concept.

Su Ren narrowed his eyes, but his men's movements were still quick and calm.

He continued to increase the number of steel balls.

When the first zombie walked up to the vehicle, Su Ren shot a total of sixteen steel balls at the Honda. Each shot hit a different part.

Under the temptation of these "voices", each group of zombies sent out nearly ten "scouts" to investigate.

"Zombies have a sense of numbers."

After repeated experiments, Su Ren confirmed this conclusion.

However, Su Ren was not sure whether ten people was the maximum number for reconnaissance.

Although by the eleventh stone, the number of zombies will no longer increase.

However, it cannot be ruled out that zombies can judge the size of space through echoes and adapt to local conditions.

Su Ren continued to test with the slingshot and steel balls.

But this time, he turned his attention to the other side, a lone zombie that was closer to him.

"Test again...the data of the single monster is ready."

Su Ren pulled the slingshot.

Su Ren was very calm, he knew he needed information.

For the monsters you are about to face, the more detailed the information, the better.

This is conducive to survival.

Anyway, he is now using marbles for testing, and the safety factor is very high.

And these zombies don't seem to have evolved enough to find his location.

Another dozen marbles fell rhythmically toward the zombies. This time, the steel balls didn't just fall beside the zombies.

Su Ren hit several steel balls on the zombies.

Relying on patience and skill, Su Ren used the sound of the steel ball to move the zombies away, and conducted another round of testing.

The marbles hit the zombie's head, neck, shoulders, back, wrists, etc. in an orderly manner.

Su Ren squinted his eyes and carefully observed the zombie's reaction when attacking these parts.

Is there stiffness?

How long is the immobility time?

What is the attack method?

Su Ren lives on the fifth floor, and the zombies downstairs are still within the effective killing range.

After using about two hundred steel balls back and forth, Su Ren stopped.

He took out the banknotes and started taking notes, sorting out what he had just discovered.

"Zombies have a sense of numbers."

"Sounds can cause stiffness. But zombies are extremely sensitive to sounds and will pay more attention to new sounds. It may only be confusing if they make noises in the east and west several times."

"The zombies have not lost their vision and are sensitive to light."

"There are roughly three types of zombie attack movements: pounce, bite, and tear. They move slowly."

"All zombies have some degree of torn lips."

"Front hits on various parts of the zombie's body, such as the face, neck, and upper arms, can produce a certain degree of stiffness. The back, nape of the neck, head, and upper arms can also produce stiffness. The stiffness time and difference are subject to further testing due to weapons."

Su Ren thought for a while and turned to the next page: he also wrote down the unresolved problems that he had thought of so far.

"Thermal weapon availability? Weakness? Can it be killed by destroying key parts, or is it related to blood volume?"

"Is there repair capability? Precise data on speed of action?"

"Is the action logic of zombies related to the sense of smell? What is the ranking of the action logic of vision, smell and hearing?"

In the end, Su Ren put a big question mark on every point.

From the current point of view, zombies are extremely sensitive to sound.

As a result, the availability of thermal weapons has also become an issue.

It is possible that you managed to kill a zombie, but the sound of the gunfire will attract more zombies, and you will be surrounded by zombies.

In this case... the gain outweighs the gain by shooting.

However, among all the new problems faced, thermal weapons will have the smallest impact.

Because Su Ren never thought about using thermal weapons.

First of all, he couldn't get thermal weapons at all. When he was making initial preparations, he didn't even think about thermal weapons.

Moreover, the system he got was the immortal cultivation system, which mainly used cold weapons, elixirs and talismans. Hot weapons were not something he needed to worry about.

So "the applicability of thermal weapons" doesn't bother Su Ren.

As for whether the sense of smell is useful, Su Ren has some ideas.

Regarding the smell test, although you can choose to throw a ball of beef or pork into it to see if the zombies react. But Su Ren was a little reluctant.

He needs to use less food. Even if he has saved hundreds of kilograms of meat, he is not willing to squander it like this.

How to explore and solve these problems is clearly in front of us, but Su Ren is not in a hurry.

"Anyway, there's still time."

What troubled Su Ren the most was not the characteristics of these individual zombies.

When facing zombies, as long as you understand their weaknesses clearly, you can win.

What gave Su Ren a headache... was other things.

"The monsters here are not numerical."

This is what troubles Su Ren the most.

The fact that the monster had no health and the damage it received could not be quantified was really beyond Su Ren's expectation.

Because, for games, the most prominent and significant feature is digitization.

His steel balls are undoubtedly lethal, otherwise he would not be able to stun the zombies.

However, these injuries are not represented numerically.

"That is, killing monsters in this game must be the same as in reality."

"Inflicting fatal injuries."

This is the only possible explanation.

However, this is not good news.

Su was a good citizen before he took office.

Want to find a way to fatally wound a humanoid monster?
To be continued...