At this moment, Old Man Luck saw another mechanical squirrel pop out of the warehouse where he put engineering raw materials, and this one was obviously much more delicate than the previous ones.

"This kid actually used so many of my Arcanon Crystals!"

Although the old man was angry in his tone, the excitement and joy lingered on his face.

Entering the raw material warehouse, Old Man Luck found that Leng Feng was concentrating on assembling another mechanical squirrel, and the fingers flying up and down were assembling every part like a cloud. From Lark's point of view, the parts appeared to have grown on Cold Front's fingers, and were quickly installed inside the mechanical squirrel.

Lack did not disturb Leng Feng, but silently watched Leng Feng's every step, and what made Lack's eyes flicker with surprise was that Leng Feng's movements were so skillful that he didn't look like a novice who only assembled on the first day.

Genius, absolutely genius! Old man Luck exclaimed in his heart.

It's just that what Lack didn't know was that Leng Feng had already entered a state of absolute muscle memory at this time, and at this time, he hadn't realized the existence of Old Man Rak.

Finally, the mechanical squirrel in Leng Feng's hand was completed again, and the mechanical squirrel jumped out of Leng Feng's hand at the moment when he finished assembling it, came to the ground, and began to jump around and blend into the group of mechanical squirrels on the ground.

When Leng Feng wanted to repeat it again, he found that there were no more parts on hand, and the Arcanon Crystal in the box was empty.

At this time, Leng Feng came out of the state of absolute muscle memory.

"Mr. Rak, when did you come back?"

Leng Feng, who had just regained consciousness, suddenly saw the old man Rak standing at the door, but he was startled.

"Brown, you kid consumed all the Arcanon Crystals I've collected for many years, and made a mess of the warehouse. Dare to ask me when I'll be back, hmph, now punish you for cleaning up immediately! ”

Old man Rak was very angry on the surface, but in fact, he had already blossomed in his heart, he had just taken a cursory look, these dozen mechanical squirrels, none of them were of ordinary quality, there were eight excellent qualities, five excellent qualities, for a novice, it was already very rebellious to be able to do this in one day. It's a pity that I didn't teach this kid how to develop gunpowder, otherwise, after these dozen mechanical squirrels are loaded with gunpowder, they can reach advanced engineering items.

Leng Feng naturally didn't know that Old Man Rak's appearance was inconsistent, and at this time, Leng Feng smiled and hurriedly took the tools to clean up.

"Hmph, waste my Arcanon Crystal!"

Old man Rak was thinking about pretending to the end, and when he saw a mechanical squirrel running over, he kicked it away.

Hearing only a clang, Leng Feng was stunned for a moment.

"Teacher, you ...... Run! ”

Leng Feng exclaimed, hurriedly threw away the cleaning tools, and ran out of the door.

Old man Rak was still wondering why Leng Feng was running out in such a panic, but then he knew, because the two eyes of the mechanical squirrel he kicked turned from green to red and rushed towards him.

"Is it ......?"

Old man Luck couldn't believe his judgment, but the creaking sound of the mechanical squirrel running over was so clear and audible.

"Boom—"

A series of explosions roared inside Rak's house, and the whole house was shattered into pieces by this explosion, and these explosions, like countless fireworks, reflected the island of the wicked who was about to fall into the night as if it were day.

"Teacher Luck is really dedicated, he just went home and did a blasting experiment." Pubal sat on Mukla's back, looking at these colorful fireworks, and suddenly felt so beautiful.

"Lark, this kid won't let people cook, really!" In the panda man's cottage, the panda man Lao Lin was cooking, but due to the vibration caused by the explosion, a wisp of dust was sprinkled into the dishes being cooked.

Looking at this series of explosions, Leng Feng was a little stunned, he swallowed a mouthful of saliva, although the power of this explosion was smaller than that of the ancient goblin engineering bomb, but presumably as a master, Rak should be fine.

Just as he was thinking this, Lark appeared in front of Leng Feng in pitch black, the hair on the black mole still emitting black smoke.

"Why didn't you say earlier that these squirrels were filled with high explosives?" Old man Luck coughed twice and complained.

"Teacher, you didn't ask. How do I know why you're so good at kicking that self-detonating mechanical squirrel? Leng Feng was a little speechless.

Hearing Leng Feng's words, Old Man Rak's face turned red, if he hadn't been blackened by the explosion, he would probably have been discovered by Leng Feng.

"Ahem, let's do it, anyway, our house is gone, so let's go to Lao Lin's house and they will eat."

To Leng Feng's surprise, Old Man Rak didn't have any anger, but calmly led the way in front.

Leng Feng secretly breathed a sigh of relief, this is okay, Leng Feng originally thought that he had caused such a big disaster and would be punished by Old Man Rak, but he didn't expect it to be so easy to get by.

Coming to the home of the panda man Lao Lin, Ah Fei was still practicing boxing in the night, Lao Lin was carrying a plate of dishes out of the kitchen, but he saw Leng Feng, I don't know if he did it intentionally or unintentionally, he actually said: "Dark night, why did you come here alone, is there something wrong?" ”

"Old Lin Tou, you can see clearly, I'm here too!" Old man Rak said angrily.

"Oh? I thought there was no one in front of Leng Feng, it was rude, and the night was too thick to see clearly. Leng Feng could see that the panda man Lao Lin wanted to laugh but couldn't help but not laugh.

"Hmph."

Old man Rak snorted coldly and walked into the hall of the cottage.

The cooking skills of the panda man Lao Lin are recognized as the first on this island, and the second is naturally Leng Feng.

Seeing the food, Lark also forgot about the unhappiness just now, and the panda man Lao Lin still laughed, and Ah Fei also grinned.

"I said old man Rak, if you do experiments, you will conduct experiments, why do you make yourself so disgraced." Panda man Lao Lin took a sip of green bamboo wine and said with a smile.

"It's not ...... yet" Old man Luck was about to explain the reason, but he didn't think it was right, if he knew that he had kicked a self-detonating mechanical squirrel and caused a chain of explosions, I am afraid that these guys would have to die of laughter.

"It's not that the explosives are too strong, alas, it's old." Old man Luck also picked up his glass and took a sip of wine.

Leng Feng almost didn't squirt out the rice, but it was better to hold back a smile and continue to eat silently.

"By the way, I heard Ah Fei just now, you guys played a draw today, and the third game in seven days, do you have any plans?" At this time, Lao Lin mentioned today's game.

"Competitions? What competition? Leng Feng was a little surprised and couldn't help asking.

"You don't know?" Ah Fei, who had always been silent, exclaimed.

Leng Feng smiled bitterly and said, "I've been practicing engineering, and this morning Teacher Luck left after giving me two tasks, I really don't know." ”

At this time, Old Man Rak nodded, indicating that what Leng Feng said was true.

Seeing this, Ah Fei told Leng Feng about the situation of the game 1510, and after listening, Leng Feng's heart couldn't help but sink.

The result of this gamble turned out to be related to the hundreds of years of cultivation of Old Man Rak, although today's result was a draw by Ah Fei's strategy, but the event seven days later made Leng Feng worried.

"Ah Fei, are you sure about the competition in seven days?" Leng Feng asked Ah Fei in a deep voice.

"Nope!" Ah Fei replied very resolutely, "If I didn't know about their methods, I would definitely not be able to win." The strength of that fat goblin is very good, and I heard the senior say that the strength of the goblin with a mechanical arm left at the end is even more extraordinary, and it is difficult to win him! ”

Hearing this, Leng Feng's face changed several times, and then, Leng Feng took a deep breath and said with a deep gaze: "In this case, I have the courage to challenge Senior A Fei in engineering." ”

As soon as Leng Feng said this, everyone else was stunned.

"You mean, you want to fight that guy." Ah Fei's surprise did not disappear.

"Not bad." Leng Feng nodded.

"Okay, I'll take it. Tomorrow, we will fight again! Ah Fei smiled.

Seeing the two students like this, the old man Lack's eyes showed a touch of emotion, at this moment, he remembered that his house had been bombed, and there was no engineering equipment and raw materials on the island, thinking of this, Luck took a sip of wine, got up and said goodbye.

Early the next morning, Old Man Luck brought back a large pile of engineering materials and equipment, and placed them in a cave on the island.

At the entrance of the cave, Leng Feng and Ah Fei set up a table, which was full of raw materials and equipment, and there were also freshly made furnaces and anvils next to them.

This time, Leng Feng did not choose the self-detonating mechanical squirrel that he was already proficient in, but chose a new design drawing, the name of this design drawing, called Goblin Dark Thunder. As a high-level engineering drawing, the Goblin Dark Mine can be regarded as one of the top drawings of advanced engineering, and this kind of mine, Leng Feng had seen it in his first meeting with Old Man Rak.

Not to be outdone, Ah Fei picked out a high-level engineering drawing called a salt blast bomb.

The engineering battle between the two began, and the judge was naturally Lack.

Leng Feng's movements are very fast, and his speed at making and polishing parts is on par with Ah Fei. Ah Fei, who had always been silent, burst out with great enthusiasm at this time, almost trying his best to compete with Leng Feng.

The two of them completed the production of parts almost at the same time. But the most important part of the drawings chosen by the two was the development of gunpowder, which was the most dangerous and challenging part.

In the development of gunpowder, Leng Feng got it when he was making a self-detonating mechanical squirrel, but the gunpowder required by Goblin Dark Mine is one level higher than that of high gunpowder, which is high-density high gunpowder.

The so-called high density is to compress the gunpowder. Gunpowder is an extremely unstable thing, and if it is compressed at this time, the natural difficulty will increase exponentially. At this point, it is necessary to remove excess impurities when the gunpowder is grinding, the less impurities, the more stable the gunpowder will be, and the chance of non-explosion when compressed is smaller.

With the help of the Analytical Eye, Leng Feng was naturally able to know the content of impurities in gunpowder, which was why he was able to develop high gunpowder in a very short period of time.

When the high-density high gunpowder was completed, Leng Feng's face was already covered with sweat, these things, if he didn't pay attention to it, would explode, although there was a master like Rak beside him, Leng Feng still couldn't help but feel thrilled in his heart.

Before the time came, Leng Feng and Ah Fei had completed the finished product, but Leng Feng was a few seconds faster than Ah Fei.

Seeing the works presented by the two students, the eyes of the old man Lack were a little moist, these two students are both extremely talented, no matter what the result of this competition is, he has no regrets in his heart, because his mantle has been inherited by several talented students.

Old man Lark carefully observed the works of Leng Feng and Ah Fei, and finally, Lark sighed and said, "The design drawings you two have chosen are not comparable in terms of complexity, and these two works have reached excellent quality without any flaws. So, teacher I have to declare that this time the game is a draw. ”

As soon as Old Man Rak's words fell, Ah Fei laughed.

"Teacher, I lost!"

"Why?" Old man Luck exclaimed.

"Teacher, have you forgotten how long you have been exposed to engineering at night? Compared with him, I lost my heart and took it orally. Ah Fei said sincerely.

"So, in the third game, let's go from the night." Ah Fei looked at Leng Feng, his eyes full of expectation.

"So...... So be it! ”

At this moment, Old Man Luck realized this, and he suddenly found that he could no longer see the end of Leng Feng's development in engineering, because Leng Feng's talent was so high that he could only sigh.

"Perhaps, that legend is true!" Old man Luck thought to himself.

At this moment, Leng Feng saluted Old Man Rak and said, "Teacher, from now on, I will leave the Wicked Island for a few days, and I will come back on the day of the competition." ”

Lark was stunned for a moment, but agreed. No matter what Leng Feng wants to do in the past few days, as a teacher, what he needs to do is to let this student get the greatest freedom and let him soar at will.