Through the data room of the first reserve camp, Tang Ling knew that people's sleep was very important.

Sleep patterns are divided into 'REM sleep', where the eyes move rapidly when dreaming, and 'Slow wave sleep', where brain waves enter high-amplitude slow-wave oscillations when there is no dream.

Slow-wave sleep is conducive to the recovery and recuperation of the body, while REM sleep is a sorting out of the memories recorded during the day, and the brain will start to re-activate at this time, which is conducive to the recovery of mental strength.

The combination of these two patterns results in a sleep cycle that takes about 90 to 110 minutes.

The average person needs to complete 4-5 cycles, or 7 to 8 hours, to maintain peak physical and mental fitness.

And Tang Ling monitored himself through accurate instinct, and found that he only needed 3 cycles to maintain his peak state.

However, he didn't have time to indulge in the luxury of 3 sleep cycles.

So, after exploring again and again, he found that only by maintaining a complete sleep cycle and reusing the rest of the cycle to rest with scattered fragments of time, he could barely complete the remaining two cycles.

The effect is not the best, but it can barely keep the body and mind in a relatively good state.

This means that the instinct for precision, unconsciously takes another step forward.

At least in terms of monitoring and grasping itself, it is comparable to an 'instrument', just like the 'sleep monitoring bracelet' of the pre-civilization.

Finally, I can work precisely to get an accurate analysis and calculation result even when I am not very conscious of my own consciousness.

This made Tang Ling very much looking forward to the further development of precision instinct, what potential will it have?

The bath became quiet again, and the regular sound of the water was like the best 'hypnotic sound', which made Tang Ling quickly fall into a deep sleep.

97 minutes later, at 8:39 a.m.

Tang Ling opened his eyes suddenly, and after a cycle was completed, he woke up without wasting a second.

The precise instinct that has been running slowly is like a most punctual alarm clock, which will 'wake up' Tang Ling in time.

Without a moment's delay, Tang Ling put on his combat uniform.

Almost at a trotting speed, he ran out of the first reserve camp and came to the Hope Cliff Secret Road area.

It is guarded by special personnel, and the secret passages that lead in all directions under the Cliff of Hope can lead not only to Safe Zone 17, but also to the battlefield, as well as the forests on both sides of the Cliff of Hope.

The clearance of the First Reserve Battalion badge allows access to the secret passage at any time, but it is not allowed to enter the secret passage leading to Security Zone 17.

"Hey, hunting boy, again? Is this time going to the left-wing mangrove, or the right-wing mangrove? When the soldier on duty saw Tang Ling, he casually teased him.

I really have never seen such a crescent warrior, as an elite, he does not accept the task issued by the Hope Barrier, which is more beneficial to himself, but runs to the mangrove every day.

However, this kid is well-behaved and sensible, and every time he comes back from Manglin, he will give the meat on his body to these soldiers on duty.

So, everyone was happy to keep silent about his whereabouts, and help him keep it a secret, lest this unscrupulous and hunting boy anger the real high-ranking in charge of the First Reserve Battalion and be expelled.

"Whatever, left or right." Tang Ling smiled kindly, and didn't care about the warrior's ridicule.

It was these places that people liked, and the warrior also smiled, no longer verbose, but opened the door of the secret passage area, and led him into the secret passage hall where there were not many people at this time, opening a secret passage to the left wing of the mangrove for him.

"I said kid..." After opening the door this time, the warrior did not rush to leave, but hesitated and stopped Tang Ling.

"Hmm." Tang Ling was a little apprehensive, could it be that he was really too much? Going to Manglin every day has already embarrassed these warriors?

In fact, nothing like this happened, and the warrior hesitated for a moment, but said, "Don't be so obsessed with staying in the forest, although it is easy to find food there." ”

"But isn't a more dangerous battlefield more conducive to self-improvement?"

"And, the harvest will be even greater."

"Ah, that's right." Tang Ling grabbed his head a little embarrassed, then looked up at the soldier seriously and said, "But, I'm very timid." ”

"Stinky boy." The warrior was speechless, and simply waved his hand, letting this boy, who was flattering but not seeking progress, hurry away.

**

Left-wing mangroves.

Located on the left side of the Hope Cliff, it is bounded by the Hope Cliff and divides this large area of mangrove into two.

The inner part is surrounded by the former settlement, the so-called sub-safety belt, also known as the Inner Manglin.

The outer forest encircles the battlefield area and spreads out into the boundless distant mountains - it is collectively known as the Outer Forest, or the left side of the Hope Cliff is called the Left Wing Forest, and the right side is called the Right Wing Forest.

Security Zone 17 troops are stationed at the foot of the Hope Cliff, where they form a tight defensive belt.

Because of its existence, it is impossible for the people of the former settlement to pass through the inner forest and come to the outer forest.

And the fighters of the Fortress of Hope will not be able to enter the secondary safety belt through the Manglin and return to the 17th safety zone.

This is the reason why the 3D holographic projection can deceive everyone, with the cooperation of powerful force, the front and back of the cliff hope are divided into two worlds.

Why such a stubborn division? The arborvitae instructor once revealed some information in an unintentional remark.

Because of the population, because to create a relatively safe place to bring to attract the population! In particular, excellent populations, such as the Leicester Ranger Camp that was once wiped out by Leicester Silverbacks, are excellent populations.

If some bloody truth is laid out on the table, will there still be outsiders joining Safe Zone 17?

Tang Ling thought so as he cautiously walked among the bushes in the left wing, searching carefully.

He's looking for a plant that grows only at the bottom of the bushes and has a cute name, Sournil Tata.

It is a tower-shaped plant that produces pink fruits that sour people's teeth in the fall.

This fruit can be used as a condiment, but what Tang Ling needs now is its leaves.

Because its leaves are crushed, they release an earth-like smell and a slight acid that masks other odors, making it the best plant to hide its scent.

Last time, Tang Ling found a few, but with frequent entry into the mangrove, they had already run out.

Now, finding Sour Nir Tata is a top priority, otherwise the survival rate in this vast left-wing forest will be greatly reduced, let alone hunting.

Before, the kind soldier reminded Tang Ling that Manglin was a good place to forage, but it was far less dangerous than the battlefield, so he really misunderstood something...

Tang Ling shook his head helplessly, and then his eyes lit up, and a sour Nier Tata that looked like a small tower had been caught in his hand.