When Lin Yuan's mind locked on the second-level panel frame, he automatically received a confirmation of whether it was activated or not.

The moment the selection is confirmed, the frame of the panel immediately shows the mode of the progress bar, and the 3000/3000 sign at the top also begins to decrease rapidly.

To Lin Yuan's surprise, this second-level option of primary dynamic tracking capture actually consumed 300 experience points, so it seems that different sub-options, according to the complexity and importance, the cost of activation is also different.

Fortunately, the consumption of 300 experience points is still within the range that Lin Yuan can accept.

As for the next, he hesitated for a moment, or gave up the option of activating luminous vision, this option can allow him to have a certain degree of night vision, but at the moment he has night vision, plus double vision, even at night, he can easily see three hundred meters away, so this option is not urgent.

Further down, there is this branch line related to hearing, originally, Lin Yuan already has double hearing, and the remaining two secondary sub-options are, infrasonic shock induction, ultrasonic shock induction.

These two sub-options are a bit sci-fi, Lin Yuan hesitated, or chose to give up for the time being, he is now in this program world, he is not here to eavesdrop, improving combat effectiveness is the most important.

According to this primary and secondary level, the olfactory branch, taste branch, and tactile branch have also been given up by Lin Yuan, in fact, the sub-options of these two branches are also quite magical, for example, in the olfactory branch, in addition to double the sense of smell, there is also odor reduction, that is, you can know what person or animal passes by by smell, and the third is olfactory tracking, which can basically be more powerful than a dog's nose.

The two inactive sub-options of the taste tab are nutritional analysis, toxin identification, which can determine which food is better, and toxin identification, which prevents others from poisoning food.

As for the tactile branch, it is very weird, and the two sub-options that are not activated are pain control and curing the skin.

Pain control should be able to reduce the pain when you are attacked, so as to avoid interference, of course, it can also increase the sensitivity of the skin, which can be applied to sexual intercourse, and it is estimated that it will be refreshing.

And that cured skin should go to the other extreme, making the skin firm and rough, because in the next sub-option of this option, there will be the option of rock skin.

But at present, Lin Yuan is not quite sure that he needs to do this, what if this kind of rock skin cannot be faded and exists twenty-four hours a day?

It's wicked!

After abandoning these branches, Lin Yuan's next focus is the neuronal response, and now he has activated the first one, that is, the double neuronal response, and the second and third ones that have not been activated are arc reflex and central reflex respectively.

To be honest, Lin Yuan didn't understand these two terms at all, but he could be sure that this was a very important physical indicator, and he would probably understand it when he looked at the third-level sub-options of these two second-level options.

That arc reflex should refer to the subconscious body reaction, that is, without going through the subjective consciousness of the person, for example, when a person's foot suddenly steps on a nail, the first reaction is not what should I do? Who threw the nail so lacking in virtue? Rather, it should be the body jumping up immediately without thinking, which is probably what it means, and this arc reflex reinforces this response.

This is undoubtedly very powerful, whether it is long-range shooting, or melee combat, this high-speed non-active consciousness reaction is definitely a magic weapon to defeat the enemy.

Therefore, Lin Yuan did not hesitate to choose to activate, and as he expected, activating this second-level sub-option immediately consumed his 450 experience points, which shows its importance.

As for the third one, the central reflex, Lin Yuan pondered carefully for a long time before he vaguely figured out that this is the opposite of the arc reflex option, which automatically reacts without going through the subjective consciousness of the person.

The central reflex is a reaction that occurs under the control of the subjective consciousness of the person, which can be understood in this way, for example, Lin Yuan faces an enemy, he will first simulate the enemy's next action plan, so as to carry out the corresponding arrangement, a bit similar to the feeling of strategizing thousands of miles away, everything is expected, under control, every detail of the entire battlefield is in his head, every grass and tree, all the same.

This option is undoubtedly very powerful, but Lin Yuan thought about it carefully, and felt that he had not yet reached this level of anticipation of the enemy, this was because of his own foundation, and this activation direction was more similar to that kind of high-IQ character who could do it.

And Lin Yuan, is he the kind of person who has no last resort and controls everything? Of course not.

So even if he activates this option now, it won't be much of an advantage, so it's better to keep it for the future.

At this time, the remaining branches, in Lin Yuan's opinion, are very important, double the bone density he has activated, this is to make the bones harder.

The second sub-option is bone toughness strengthening, which is not explained, 300 experience points, must be activated, and the strengthened toughness can ensure that even if he jumps from a height of more than ten meters, it will be difficult for him to break his legs.

The third sub-option is a little interesting.,It's bone growth.,Synthesize the three sub-options of the third level.,Bone spur hyperplasia,Bone deformation,Bone armor,It can be basically determined.,This branch is very powerful.,And it's a mutant system.,Maybe it will eventually become a Wolverine-like existence.。

But Lin Yuan estimated that the cost of activating this option would be very large, he couldn't get the experience points he had now, and the effect was slow, he had to be promoted next time before he could open the third-level sub-option, which was not suitable for his current situation, so he gave up for the time being.

Behind the bone density branch, there is the muscle strength branch, the first sub-option double muscle strength has been activated, and the second sub-option is also muscle toughness, which is also not explained, it must be activated, because this is similar to bone toughness, which can increase the ability to resist blows, even if it is hit by a bullet, it will not be too badly injured.

And the third sub-option,It's muscle burning.,Contact the third-level sub-option.,This is another kind of ability type of strengthening.,You can burn muscles.,Burst out with huge power and defense.,Similar to berserker madness.,But this is the same as bone growth.,There is not much combat power in the second-level sub-option.,You have to activate the third-level sub-option to have specific combat power.,He can only give up temporarily in reluctance.。

By this time, Lin Yuan had already consumed a total of 1,350 experience points, which was okay.

Next, there is the internal circulatory energy system, which is special because it encompasses almost all the internal organs, blood systems, lymphatic systems, and so on of human beings, and it seems that its importance is underestimated.

You know, if a person is faced with the choice of having one leg cut off or having his liver or heart removed, he would basically rather give up one leg.

And this branch is quite vague, needless to say about the first sub-option, the second sub-option is also very simple, double the resistance to hits.

The third sub-option is simpler and doubly adaptable.

In a literal sense, if you contact the third-level sub-option, you can basically think that this branch is to increase the survivability of the visceral system, for example, in the third-level sub-option, it is actually an option to swallow strong acid, high-intensity digestion, and hunger durability.

Therefore, Lin Yuan didn't hesitate too much, after all, the visceral system is the weakest link in the human body, and it is right to strengthen it.

These two options cost him another 600 XP.

After selecting the activation, the next branch is the brain domain capacity, this Lin Yuan skipped directly, this branch is obviously related to intelligence, or wait for later.

At this time, there were still two branches left, but in Lin Yuan's opinion, they were all the most important branches.

The cell viability branch, which is important, in addition to the first double cell viability option, the second option is broken cell repair and the third sub-option is viability cell growth.

Contacting the third-level sub-option, it can basically be understood that the first double cell activity can keep people young, not aging, and it is also rare to get sick, and the immunity is very strong.

The second option, Broken Cell Repair, means that after being injured in battle, the wound can be healed very quickly.

The third option, active cell growth, is a complete boost to immunity, which is thoroughly specialized compared to the first option, which can reduce toxins, plagues, radiation contamination, etc., and the effect is so powerful that it explodes.

Lin Yuan naturally wanted to activate all of these two options, but when he activated the second broken cell repair option, he directly consumed 1,000 experience points, which stunned him.

At this point, he has already consumed 2950 experience points, and he can no longer activate any option for the adrenal hormone secretion branch.

In the next second, Lin Yuan felt that his eyes were dark, and then he reappeared in place, but the whole person was naked.