Xin Xiao was checking the content about boxing, felt a vibration in his wrist, and exited the virtual world to see the information, it turned out that the courier had arrived.

He walked to the balcony, an unmanned aircraft hovered here, the biplane fuselage more than half a meter long was silvery-white, like a fighter jet with the same proportions reduced, and the side was painted with the words "FedEx", Xin Xiao just approached, a screen was projected from the head of the drone, and the voice prompted: "Please confirm your identity." ”

Xin Lin entered his citizen serial number, the drone ticked, and the dark compartment under the abdomen opened, holding out a fist-sized box, boxy, very tightly wrapped.

"Thank you for your trust in FedEx and welcome to use it next time." As soon as Xin Lin took the box, the drone turned around and flew away with this sentence, extremely fast, and disappeared into the sky in a few breaths.

Xin Lin is not surprised by this, most couriers are delivered by drones these days, unless it is a large item or something very valuable, there will be a courier to deliver it to the door. For example, the exercise chip of "Seven-colored Stellar Flame" is worth more than 100 million, and the super energy center does not dare to use drones, so it specially sends three people back to the room, Xin Lin unpacks the packaging box and takes out two small glass bottles. The transparent glass bottle is very delicate in appearance, as big as a little finger, with the logo of the Rainbow Society printed on the top of the cap, and it is filled with scarlet liquid, like blood, which is not recognizable through the bottle, and the dosage is about five milliliters.

Xin Lin picked up one of the bottles, shook it slightly, and the red liquid inside also fluctuated, and said secretly: "Such a small bottle of potion costs 50,000 yuan, I don't know how effective it is." ”

"Try it with a bottle now." Xin Lin unscrewed the cap of the bottle, put it under his nose and sniffed, and smelled a faint smell of sulfur, mixed with sweetness, and felt fine, not as pungent as he imagined. Without the slightest hesitation, he tilted his head and poured the potion into his mouth, no matter what it tasted like, and swallowed it directly.

When the medicine went down, a sulfur smell suddenly rushed to the nostrils, with a bit of heat, choking like drinking chili water, making Xin Lone's brows furrow, and he forcibly endured it so that he didn't sneeze.

After a few seconds, the potion quickly took effect, and Xin Lin noticed that the potion he had just drunk turned into a stream of heat, penetrating directly through the esophagus, mixing with the blood and flowing all over his body. The largest stream of heat entered the heart, and the heart beat violently, and as soon as the heat flow came into contact with the nine Force nodes, a wonderful change immediately occurred.

At this time, under the stimulation of the heat flow, the speed of the transformation of the force suddenly accelerated, and the thermal energy force formed was much more than before, and the newly generated force continued to flow into the node.

After carefully experiencing it for a few minutes, Xin Lian estimated that this bottle of Flame Lizard Heart Blood Elixir had increased his cultivation speed by 23%!

There is a special explanation when the Rainbow Club buys the potion, the improvement effect of the Flame Lizard Heart Blood Elixir varies from person to person, the slowest can also increase the cultivation speed by 10%, most users increase by about 15%, and the fastest can even be close to 30%.

Xin Lin has increased by 23%, which is a very good medicinal effect.

You must know that the effect of a bottle of Flame Lizard's Heart Blood Elixir can last for a whole month, and the 50,000 yuan is not unjustly spent, it should be worth it.

"What a good thing! Talent is not enough to make up for money, and with this Yan Lizard Heart Blood Elixir, it can almost make up for the shortcomings of my genetic attribute fit that is not outstanding enough. Xin Lin took the remaining bottle of medicine and made up his mind that he couldn't stop taking the medicine and would stick to it in the future!

However, Xin Lin also knows that the medicine is not without hidden dangers, drinking too much will produce resistance, and the more the same medicine is used, the worse the efficacy of the medicine, and it is impossible to use it indefinitely. Moreover, he is still a junior samurai, and his Force cultivation is low, so the effect of the potion increase is obvious, and it will increase by 10% to 30% at every turn. It is said that when you reach the realm of military generals, the elixir that can increase your cultivation speed by 5% is very precious, and it is difficult to buy it even if you have money.

Xin Lin walked back and forth in the room a few times, the effect of the medicine was immediate, there were no side effects, and he could still maintain a state of cultivation at all times.

After putting away the rest of the potions, Xin Lin logged into the virtual network again and began to learn his strength.

The information video about the inch strength in the Rainbow Club is very complex, and many seniors who have cultivated "Seven Colors Stellar Flame" have mastered this kind of boxing strength, but the principle of boxing strength is simple to say, but it is difficult to do, and the emphasis is on their own practice, so there is no one who is particularly outstanding, and the evaluation is quite good, Xin Lin picked a few of the most popular textbooks and exchanged them with points.

The teaching materials of boxing are much cheaper than boxing, generally only one point, that is, 10,000 yuan, which seems not expensive, but it can't stand the silence and see more, and the money is spent like flowing water.

The instructor of the first hologram was a military general, who was over 100 years old, a long-established martial artist, proficient in boxing, especially all kinds of boxing, in addition to inch strength, he also mastered the strength, cannon strength and rare wave strength, can be called a master of boxing strength.

The martial artist first explained the power skills, related principles and key points of inch strength, and then began to demonstrate the way to play inch strength in person.

I saw him standing still, clenching his fist between his waist and abdomen, and suddenly punched, his fist only hit less than ten centimeters, and a crisp sound spread, fleeting, as if none of this had happened.

Xin Lian's eyesight is excellent, and he can see the process of his opponent's punch clearly. The distance of this punch is extremely short, as fast as lightning, in just a moment, the muscles on the opponent's entire arm contracted violently, and the power rebounded, forming a crisp punch, the explosive power of this force was very terrifying, almost punching the fist out of a vacuum, the sound was particularly short and powerful, as if half of the sound was interrupted, and it was unforgettable.

"I see." Xin Lonely nodded thoughtfully and continued to read.

Martial artists use different punching methods to continuously hit an inch of strength, whether it is a straight punch, a punch, an uppercut, a horizontal punch or a smashing punch, he can always use the inch strength skillfully, so that Xin Lin doesn't blink his eyes, and feels that this point is too worthwhile.

In the back, the martial artist is no longer limited to using his fists, he demonstrates how to kick with his feet, and that's not all, he can punch inches from elbows, knees, shoulders or back, and even the forehead, this incredible way of exerting force is like opening a door to a new world in front of Xin Shi's eyes!

Before this, Xin Lin had a misunderstanding, thinking that punch strength could only be punched through fists, but now after watching the display of this martial artist, he realized that he was very wrong.

The fist strength is practiced to a high and deep place, through the whole body, and the punch can be sent out everywhere in the body, as you like, no longer limited to the fist.

Of course, this requires extremely high martial arts talent, and it takes many years of immersion in boxing strength before it is possible to reach the realm of boxing strength with you.

This point has something in common with the military road seven killing boxing, the characteristics of the seven killing boxing is to use the whole body as a weapon, if you can practice the boxing strength to a high level, combined with the seven killing boxing, the power must be extremely terrifying.

Xin was convinced, and replayed this teaching video many times in a row, watching it from different angles as if learning boxing, until he remembered all the main points.

Subsequently, Xin Lin opened several other textbooks and found that the content was similar and there was nothing special about it.

The principle of inch strength and the law are well understood, and the difficulty lies in how to master the rapid compression of body muscles and explosive strength. This process is not achieved overnight, it must be done through repeated practice, once or twice success is not enough, it is necessary to successfully play an inch of strength millions of times, form muscle memory, so that there is no need to think about it in battle, the heart is in hand, and the strength of the inch is naturally beaten, and the power beyond the ordinary is bursting out.

After reading the textbook, Xin Lin exited the virtual world and entered the practice room.

First closed his eyes and pondered for more than ten minutes, Xin Lin carefully recalled what he had just seen, kneaded and refined it, and formed his own opinion, and finally, he suddenly opened his eyes, looked ahead, and slowly punched out.

This punch seemed to be nothing special, but just as the punch was about to be exhausted, Xin Shi's arm shook slightly, his muscles contracted, and his fist froze.

"No, the muscles contracted too slowly, and the strength didn't form."

Xin Lin immediately sensed the problem, thought about it for a few seconds, and threw another punch, but it was still unsuccessful. Undeterred, he tried to punch repeatedly, then corrected his mistakes, and his control over his arm muscles continued to strengthen, and he gradually gained some experience.

Syllable!

Half an hour later, after throwing hundreds of punches in a row, Xin Lian's face suddenly turned happy, and he heard a very slight short sound, if it weren't for his own extremely strong hearing, someone else might have missed it.

"It's done!"

Even if this sound is very small, if there is nothing, Xin Lin is still keenly distinguished, his punch is very slow, and the force is small, it is impossible to make a sound of breaking through the air, this is the unique sound of inch strength.

"Remember the feeling and try again." Xin Lin didn't rush to punch again immediately, deepening his comprehension of this punch in his mind, and then slowly punching again, and as expected, he heard a short crunch again.

"Okay, it's right, it's this kind of power technique that can hit an inch!" Xin Lin was very happy, and the speed of learning was much faster than he expected.

Next, Xin Lin still punched slowly, neither speeding up nor strengthening his strength, just to repeat the feeling of hitting an inch, so that the muscles get used to this way of power, form muscle memory, and finally be able to achieve a rapid reaction like a conditioned reflex.

It took Xin Lin nearly a day and tens of thousands of successful shots in a row to familiarize his right arm with this power technique. Then he switched to a left-handed punch, and because of his experience, the progress of his left arm was extremely fast, and it only took half a day to master the foundation of inch strength.

Inch strength has been practiced to this point, and it can only be said that it can barely be used, but it is far from enough to be used in battle.

Xin Lin once again began to forget to sleep and forget to eat, in addition to sleeping, he soaked in the practice room all day long, tireless and boring, punching the air continuously, the left fist, the speed of the punch increased little by little, the right fist, the punch power increased little by little, and the crisp sound in the practice room became louder and louder!