July is usually a pleasing time for the eyes, but this year's July is so cold that even the bare-legged artifact is useless.

After getting up on the morning of the 1st, I looked at the energy that had reached 120 points, but it was not enough for the time being, Lu Chen was going to use the processing room as the basis of a 3D printer to form a small automated assembly line, so that the printer could be used to print parts, and then the production line could be assembled, but this Lu Chen needed 1500 points of energy after the nano core deduction, and with 240 points of energy a day, he had to wait for a few more days.

Subsequently, after Lu Chen finished washing, he went to the garage to check the vegetables in the carriage, and found that they were well preserved, Lu Chen nodded, then took out a small cart from the warehouse and put it on the car, and drove to the official trading area.

An hour later, Lu Chen came to the vicinity of the official shelter, and when he was close to the official trading area, there were more vehicles, but there were many electric tricycles, some SUVs, small pickups, etc., and there were more than ten large trucks in the distance, all of which were still sitting, and Lu Chen observed that in addition to those electric tricycles, others like SUVs, pickups, and container trucks were all left behind, Lu Chen was also a little envious when he saw this, after all, he had been living alone underground for a month, If you weren't busy all the time, I guess I wouldn't feel good.

However, Lu Chen saw that there were only a few people in the forum he was in, and he thought that there were not many private shelters, but today he realized that it was not too many, but he was too homely, so he didn't look for these shelters, but it was not too late to come to the trading area today, and when the time came, he would see if there were any things or specialties he needed, and he could trade privately later.

Then Lu Chen parked the car on the side of the road near the trading area, put on a helmet and got out of the car, took out the trolley from the compartment and put it on the ground, then unloaded the vegetables on the trolley, locked the door, and pushed the cart into the trading area.

As soon as you enter the trading area, there is a large room in front of you, which has a lot of space, just like a vegetable market, with stalls one by one, but the gap between the stalls is still relatively large, and there is a bulletin board next to the entrance gate, which reads

——

1. This trading area is an official trading place, and there are two ways to trade, one is to rent a booth to set up a stall by yourself, barter, and the other is to exchange the materials you hold for credits inside the official shelter, and use the credits to exchange the materials you need.

2. All criminal acts such as fights and brawls are prohibited in this trading area, please comply with the relevant laws and regulations of the Dragon Kingdom.

3. Booth rental requires the use of credits for leasing, and materials can be exchanged for credits.

——

Then Lu Chen saw the materials that could be exchanged and the exchange location written under the bulletin board, and pulled a small cart to the material exchange office, and a sign was also set up next to the exchange office, which stated the exchange price of some conventional materials.

1kg of rice = 1 credit

Normal metal 1kg = 1 credit,

Rare metal 1kg = 1 credit

1kg of fruits and vegetables = 10 credits

Plastic 10kg = 1 credit

......

There are still some supplies below, but Lu Chen can't use them for the time being, and then, Lu Chen exchanged for 50kg of cabbage, got a card, and 500 credits were put into it, and then spent 10 credits to rent a stall and put his vegetables on the stall.

What Lu Chen didn't expect was that the people around him immediately gasped when they saw that the materials that Lu Chen set up a stall were vegetables, melons, fruits and vegetables are not sold by no one, but there has never been so much to Lu Chen, 300kg of cabbage and 90kg of lettuce, maybe it is nothing before the end, but what is the situation now, every inch of land in the underground shelter is extremely precious, who will spend a lot of space to grow vegetables, and those who have so much space are generally relatively powerful enterprise shelters, And the enterprise shelter is not only one person, but a lot of people, so the general planting is the staple food, vegetables and fruits can only be eaten by high-level and technical personnel, not all of them, and vegetables and fruits need to consume a lot of water resources, although the staple food also consumes, but it also consumes water resources, it is better to plant staple food.

A lot of people immediately gathered in front of Lu Chen's stall, and everyone was asking Lu Chen how to trade, Lu Chen saw that there were so many people, and took out the small cards that had been prepared for a long time, which read

10 kg of common metal = 1 kg of vegetables

1 kg of fruit = 1 kg of vegetables

Rice/wheat 10 kg = 1 kg vegetable

10 batteries for ordinary electric vehicles = 5 kg of vegetables

1 liter of fuel = 10 kg of vegetables

......

Everyone looked at the price above and fell silent, and then everyone returned to their stalls and discussed with their own people, Lu Chen was not worried when he saw people leaving, after all, so many vegetables were placed here, no one wanted them, and Lu Chen's purpose was not to let these scattered people, the main target was the official shelter, I believe that even if it is as strong as the government, it is impossible for everyone to have vegetables every meal, like those police and some officials estimate that they can only eat vegetables once every few days, and the second target is those corporate shelters, Don't look at the official shelter to gather a lot of talent, but the heritage of some large groups should not be underestimated, like those Internet giants, and some industrial giants, they want technology and resources, and now the government has lifted the military control of those mines and handed them back to the previous owners.

After Lu Chen waited for a while, people came to exchange vegetables one after another, but they were all small orders, and after a while, a group of people came from afar, came to Lu Chen's stall, and the leader said to Lu Chen with a smile:

"Hello boss, I am the head of the administrative department of Ahri Company, my name is Wang Dong"

"Hello, I'm Lu Chen"

Lu Chen looked at the person in front of him and introduced himself,

"Boss, we have taken all this vegetable of yours, and we have exchanged it for ordinary metal"

"Yes, I have 200 kilograms of vegetables left here"

"Then we will give the boss 2 tons of ordinary metal ingots here, you wait an hour, and I will notify the company to send someone over."

Subsequently, Lu Chen spent 10 credits to rent a warehouse and put the exchanged materials into the warehouse, among which the batteries of the electric car were replaced a lot, after all, this thing is still relatively easy to handle, but there is basically no one to exchange metal, food and fuel, so Wang Dong's batch of metals can be regarded as timely rain, which can save him a lot of energy.

Then when Lu Chen was waiting for the materials from Wang Dong's side, he walked around the exchange to see if there were any things he could use, and after walking around, Lu Chen found that most of the people's stalls were filled with some common materials found in the city, such as scrap iron, plastics, etc., and finally Lu Chen felt that these scattered people estimated that good things were hidden, and they still had to trade with large enterprises or officials.

An hour later, Wang Dong's truck to transport the supplies arrived, and then Lu Chen loaded the things from his warehouse into a small cart and took Wang Dong and his party to the place where he parked

Then Wang Dong's employees began to unload the goods on the ground, a bundle of these metal ingots is a weight of 100 kilograms, a total of 20 bundles, and Lu Chen also handed over the vegetables to Wang Dong, and then put a bundle of metal ingots in one hand to his car, Wang Dong looked at Lu Chen in protective clothing thoughtfully, Wang Dong still knows the hydraulic power assist device, but there is no power assist device like Lu Chen who can easily lift 400 kilograms, and if you want to drive such a big force, Also, looking at the style of the protective suit, it is a bit of the power armor in the science fiction movie, and it is estimated that the energy system should be very good.

Then Wang Dong saw that after the transaction was completed, he walked to Lu Chen's side and chatted with Lu Chen.

"Boss Lu, it's not easy to see how you dress,"

Lu Chen looked at Wang Dong and said casually: "Where, it's just a random fool by yourself, it's not worth mentioning,"

Wang Dongyou said casually: "Boss Lu is modest, if you want to move normally, the energy system is not ordinary, the protective clothing we wear now has a limited activity time, and it can only last for four or five hours, which is not as durable as Boss Lu." ”

"Oh? This means that your battery is not good, and the power storage is not good. ”

"Yes, yes, it seems that Boss Lu can get a high-capacity battery, if I want to change some batteries from Boss Lu, I don't know what Boss Lu thinks?"

Lu Chen looked at Wang Dong and was silent for a while, in fact, he was very happy in his heart, he was really sleepy and came to send a pillow, originally after his battery was upgraded, the original graphene battery was no longer needed, and he was about to find a big boss to see if he could use this backward product to exchange for some materials, but he didn't expect this Wang Dong to be so good.

After thinking for a while, Lu Chen said to Wang Dong: "It is difficult to manufacture this kind of battery on my side, the technical difficulty is very large, and the output is very low. ”

"Boss Lu, then we won't let you suffer, what needs do you have."

"I'm studying the technical difficulties, but I really don't have a good way to do it if the raw materials are missing, so if you want this kind of battery, then you must provide raw materials, and according to the amount of materials you provide, you can take seventy percent of the batteries produced."

After hearing this, Wang Dong thought for a while and said:

"In this case, what is the specific performance of the battery you are studying, Boss Lu, with the specific parameters, I can report to the company to confirm whether to trade."

"Yes, this battery uses graphene technology, which can achieve 10 times faster charging and discharging speed than ordinary batteries, and the energy density is also good, reaching 1000WH/kg, which is twice as high as the battery density on the market.

Wang Dong gasped when he heard this, what did Lu Chen do before, should you make a battery so scary, the best battery density of ordinary electric vehicles is only 300WH/kg, and the charging speed is average, Lu Chen's battery parameters would definitely cause a sensation in the past, but now only I know, we must have a good relationship.

Wang Dong knows that Lu Chen is not a simple person, not only in terms of battery achievements, just looking at the armor of this body, he knows that if Lu Chen wants to, he can definitely make weapons, and now the official is also staring at these companies, so if you want to secretly do it, it is definitely a lantern in the toilet - looking for.

Then Wang Dong asked Lu Chen to wait for a while, and then immediately reported the situation to the company, and then watched Wang Dong keep talking on the side.

On this side, Lu Chen looked at Wang Dong and contacted the company and wondered whether their communicator was made by their company or where it was exchanged, because of the disorder of the magnetic field in the blue star, ordinary mobile phones were basically unable to communicate, and only the wired network could still be used, so Lu Chen looked at Wang Dong and felt that it was incredible that he could contact the company remotely.

After a while, after Wang Dong came back, he told Lu Chen that the company agreed with Lu Chen's plan, and then exchanged their respective shelter addresses with Lu Chen, and agreed to send the materials and contracts to Lu Chen's shelter in a few days, and handed over the raw materials to Lu Chen after signing the contract on the spot, and then Lu Chen also asked Wang Dong about the communicator, only to know that it was exchanged from the official, but it was not in the public exchange list, if you know the news and ask personally, you can also buy it, but the price is very expensive, worth 10,000 credits, Ordinary people can't afford it, and the production is limited, so the exchange is not opened.

After listening to it, Lu Chen couldn't help but sigh at the strength of the country's scientific and technological strength, it was not long after the end, these black technologies were one after another, 5G was not laid before the apocalypse, and quantum communication was directly made after the apocalypse, a batch of cattle.

Afterwards, Lu Chen and Wang Dong and his party said goodbye to each other and began to return to the shelter.