Deep in the tunnels of the Shadow Light City.

"Click~" Zhang Yuan connected an energy conduit to the 3D printer, this is the most basic lightning printer, which Zhang Yuan brought out from Dalimont for backup, and now it is just in use.

The energy provided by Dallas is the energy fluctuation of the printer, which should be a small dense fusion core, which is very energetic and can support the full power operation of the Thunderbolt printer for more than 50 years!

Zhang Yuan estimated that this thing should be the backup energy core in the Dallas Doomsday Mecha.

After installing the printer here, Dallas sent someone to send various materials for printing sparrow laser guns, Zhang Yuan took a look at it and found that they were all the most basic aluminum alloys, which were a little worse than the sponge steel he used before. This thing is a civilian material at all, and its strength is very average, with Zhang Yuan's current strength, if he pinches it hard, he can leave finger prints on the surface of the material.

However, the sparrow laser gun is a weapon for ordinary people, and its strength and power are the most basic, although these aluminum alloys are low-end, they barely meet the requirements.

It took 10 days to build 10,000 laser guns, and there was only one printer, so Zhang Yuan started printing immediately.

"Lu Meng, you help me prepare the materials, and I'll calculate the parameters."

"Okay." Lu Meng took the aluminum alloy and began to put these things into the nano grinder and crush them into powder.

Zhang Yuan took the pen and paper and used it for two purposes, while calculating the various parameters required for the sparrow laser gun under the new material, and at the same time, he contacted the main brain in his mind.

"Mastermind, absorb all the spirit of this box of fluorescent jade stones, and condense them into flawless jade pills."

"Absorbing ...... Drain successfully, the owner currently gains 3790 Pure Spirit ....... Flawless Jade Pill is being synthesized...... Estimated time is 45 minutes. ”

This news made Zhang Yuan very excited, 3790 points of pure spirit, converted into a star shield, that is more than 3.7 billion, if he earns this money by trading, the devil knows when he will be able to make enough.

Judging from the consumption of the Tinder Mecha at 10 points a day, these spirit points can already support 379 days, and he has plenty of time at once.

The sparrow laser gun has a simple structure, and the parameter calculation is naturally easy, and after a while, Zhang Yuan completed the parameter adjustment, and he saw that Lu Meng was still busy grinding aluminum alloy, so he walked over to help.

The two cooperated tacitly, and their speed suddenly increased greatly, taking advantage of this opportunity, Lu Meng said in a low voice: "That black crow has been staring at us. ”

Zhang Yuan also found out, and the guy was hiding in the shadows outside the passage: "This guy's body is probably in the upper stage of the berserk, and he is still a fighting master, and he has complete combat equipment." We fight together here, and the victory or defeat is unpredictable. ”

This passage is too narrow, you can't use mechas, you can only rely on fighting techniques and individual weapons, such a battle is very dangerous, fighting skills are okay, but no one knows that the other party will have a kind of weapon, and anything may happen after the fight.

Lu Meng asked while controlling the nano grinder, "The ore is already in hand, should we find a chance to escape now?" ”

Zhang Yuan shook his head slightly: "Of course not, let's get these 10,000 laser guns out first." I'm going to see what Dallas wants to do. And now that the other party is keeping an eye on it, the risk of escaping is too great. ”

"It's fine." Lu Meng knew that Zhang Yuan wanted to get a rhodium magnetic engine, so although she knew that it was very dangerous to do so, she still agreed without hesitation.

The structure of the laser gun is very simple, although the number is 10,000, but most of them are repetitive operations.

After Zhang Yuan and Lu Meng got the printing materials, they got the materials into the printer, pressed the start button, and the printer was 'buzzing'.

Zhang Yuan clapped his hands and said with a smile: "Okay, after that, we will ensure that this thing will not stop." ”

It was an easy job, and when the two of them had free time, they both looked left and right about the situation in the underground passage.

This is an underground space, more than 10 meters long and wide, about 5 meters high, with aluminum alloy materials scattered on the ground, this space has three exits, one leads to the room where Dallas is located, and the other two lead to the deeper part of the mine, if you listen closely, you can hear the sound of metal colliding in the passage, this is supposed to be the miners mining fluorescent jade ore, which indicates that these two passages should lead to the deeper part of the mine.

Lu Meng said in a low voice: "If we want to go out, we must pass through the passage where Dallas is located." ”

Dallas is very likely to be a strong man in the upper part of the apocalypse, such a character, even if there is no mecha, his combat effectiveness is also very terrifying, his reaction speed, strength, and momentum are greatly beyond ordinary people, especially a guy like Dallas who likes to run around, there must be a lot of hole cards to save his life and defeat the enemy.

Such a person will not be provoked if he can.

Zhang Yuan didn't speak, he carefully recalled the details of the previous Dallas residence, that room was not big, and it was a little wider than the average place. There weren't many things, a table, a chair, a rhodium magnetic brain with surveillance images turned on, and the chisel marks on the surrounding walls were fresh, which should have been chiseled out temporarily.

Judging from that situation, Dallas dared to stay in the depths of the Ghost Light City Mine, and he would definitely leave a good way for himself to retreat. If he really wants to be discovered, it is definitely impossible to leave from the main gate of Spectral Light City, he has two ways to leave here, one is to use some kind of teleportation method, and the other is to find another exit from Spectral Light City.

Thinking of this, Zhang Yuan's heart suddenly moved, and he thought of a possibility, and he said in a low voice: "Lu Meng, you said that it is possible, let's go to the depths of the mine and find the secret exit of Ghost Light City." ”

Lu Meng's brows moved slightly, and he quickly realized what Zhang Yuan meant: "He wants to leave here, large-scale teleportation is impossible, there is no such condition." If the small teleporter is not far enough, the movement is large, and once Dallas reaches the ground, it will be locked immediately, so if he wants to leave secretly, he will most likely find another exit from Spectral City. ”

Speaking of this, her eyes lit up: "That black crow should be Dallas's henchman, we may be able to find a breakthrough from him." ”

Both Dallas and the Crows are dangerous people, but compared to Dallas, the threat of the Crows is not worth mentioning.

Zhang Yuan nodded slightly: "That's how it will be done then." ”

After making up their minds, the two settled down to give birth to sparrow laser guns, which can produce about 1100 in a day, these laser guns do not deliberately improve the quality, but he has a rigorous personality, even if it is built at will, the laser gun may appear a little rough in appearance, but the performance of the gun is very stable, and it is very durable, and the performance of the laser gun can be guaranteed in a harsh environment.

Once a day, the crows will appear and take away the laser guns without saying a word.

When he took away his weapon on the first day, Zhang Yuan immediately took out a pocket energy sensor, which was only the size of a thumb cover, but it could detect high-energy reactions within a radius of 100 kilometers, and would immediately alarm threatening energy reactions, and record the number of bursts for ordinary energy reactions.

Zhang Yuan threw the energy sensor in the corner of the wall, and then continued to bury his head in printing the sparrow laser gun, Lu Meng worked beside her, and every once in a while she would check the energy reactor count.

After waiting like this for a long time, Lu Meng reported: "There is a reaction, 208 times for small energy reactions, 2 times for medium energy, and the distance is 30 kilometers away." ”

Zhang Yuan said in a low voice: "There is a conflict in the Ghost Light City. ”

On the second day, the third day, the crow came on time to collect the sparrow laser gun, and each time he didn't say a word, took it and left.

Shortly after he took the weapon, the energetic reaction detected by the energy sensor immediately rose a step, indicating that the conflict within the city was intensifying.

It wasn't until the 8th day that when Black Crow checked the performance of the sparrow laser gun, he suddenly said, "Man, your craftsmanship is very good, and the laser gun you created is very useful." Lord Dallas, let me ask you, would you ever craft other weapons? ”

Zhang Yuan was adding printing materials to the printer, and when he heard this, he kept moving his hands and replied without turning his head: "Of course I will, I was a mechanical engineer before I broke into the stars." As long as there are drawings, I can build you even a mecha, and of course, this is all for payment. ”

"You can also build mechs?" The black crow's eyes lit up slightly, and then it returned to normal.

Zhang Yuan had already finished adding the printing materials, he started the printer quickly, then clapped his hands, and turned his head to look at the black crow: "Yes, yes, but the performance of my printer is average, and at most it can only build an ordinary mecha." If you only have one printer, it will take as little as 3 days to build a mecha. ”

"Oh~" Black Crow thought for a moment, and then he said: "Lord Dallas, I hope you can create a more powerful individual weapon, which is simple to operate, has strong armor-piercing performance, and the best materials to make are these aluminum alloys. As for the remuneration, we don't have much fluorescent jadeite on hand right now, and this high-quality jadeite is considered a deposit. ”

As he spoke, the black crow took out a stone that was as green as water and exuded warm fluorescence, which was about the size of an adult's fist, and it looked very beautiful, making people reluctant to turn their eyes when they looked at it.

"Target being detected...... Detection complete, and the target contains 721 Pure Spirit points. The voice of the main brain sounded in Zhang Yuan's mind.

Zhang Yuan was not in a hurry to take the jade, he took out the paper, and quickly wrote the calculation formula on it, the crow glanced at it, and saw the mathematical formulas in his eyes, he was dazzled, he knew a single character, but he didn't know anything about it together, but the more so, the more he felt that Zhang Yuan was a professional, and the more convinced he was of Zhang Yuan's ability.

Ten minutes later, Zhang Yuan drew a sketch of a weapon on paper, and he handed the sketch to the black crow: "I changed it with a sparrow laser gun, called a focused laser gun, the gun body is one meter long, the energy consumption is 5 times that of the sparrow, the penetration of a single laser is 13.4 times that of the sparrow, the charging time is 0.37 seconds, the range is 800 meters, the accuracy error is less than 1 mm, it can penetrate the armor of the ordinary level mecha, and the weak point of the elite level mecha can also be destroyed, and a basic energy core can fire 17 rounds." ”

Hearing these data, the black crow's eyes lit up, and he nodded again and again: "Yes, yes." Stop the sparrow laser gun for a moment, you immediately produce this new weapon, we want at least 1,000 pieces, you take this. ”

He handed the fluorescent jade to Zhang Yuan.

Zhang Yuan took the jade at this time, and said at the same time: "The structure of the focused laser gun is much more complex than that of the sparrow, and I can only produce up to 200 pieces a day. ”

This speed was clearly not in line with the Crow's requirements, and he asked, "What if I give you two more of these printers?" ”

Zhang Yuan took the paper and calculated again, and then said: "If the three printers are running in parallel, I can use a more efficient printing method, and I can make 800 printers a day." ”

"Very good, then you print first, and the new printer will be delivered soon."

After speaking, the black crow turned to leave, and after walking a few steps, he suddenly turned around and said: "You are all talents, work hard, it will be beneficial." ”

Zhang Yuan was already immersed in adjusting the printer parameters, and his heart moved when he heard the words, but the surface was not exposed at all, he showed a body that did not like to be disturbed from work, and waved his hand unceremoniously: "You still need to say this!" ”

The black crow was not angry, glanced at Zhang Yuan meaningfully, turned around and left.

After he left, Lu Meng, who had been beside him silently, whispered: "The conflict in Ghost Light City has escalated, and now you can even bring printers, it is estimated that these miners occupy a lot of places." I think Dallas will need more and better weapons, and maybe even mechs. ”

Zhang Yuan nodded: "It should be like this, we are in the deepest part of the mine, don't worry about this, just production." ”[.]