Super Weapon Swap System

The person Qin Guan was most afraid of seeing was Lisa. After entering the system a few times, he didn't see anyone else. He was almost always being pestered by Lisa.    

    

What about this time? Would Lisa come up from behind and use the full meatball to rub against him? I really can't stand it.    

    

Qin Guan thought in his heart as he observed his surroundings.    

    

This place was still the same as before; it was just a vast expanse of land. There was no boundless grassland, there was only a gurgling stream. At this time, by the stream, the Empress and Zhou Hou were playing the zither. The melodious sound of musical instruments echoed in the space.    

    

Where was Grassland Hero?    

    

Grassland Hero's wooden horse was broken, and one of its legs fell off. At this moment, Grassland Hero was repairing the wooden horse. He even said confidently, "I won't let you cross the river. Find the female horse over there. You won't listen to me. It's clearly autumn now, why are you in love?"    

    

This was Qin Guan's spiritual world, a place that had not been developed. Everything here was in his spiritual world. He could get whatever he wanted. Qin Guan looked at Grassland Hero. It had been so long, he must have been holding it in for too long.    

    

"Huala!" All of a sudden, the entire wooden horse fell apart.    

    

"Damn it!" Grassland Hero's face was full of anger. "You still don't want to follow me, right? If that's the case, then I don't want you anymore. I will find a tank to play with. I will use armor-piercing bullets to kill you. "    

    

It seemed that the tank test during the day had shocked Grassland Hero. He was already interested in tanks.    

    

Where was Lisa? Where was Lisa?    

    

Qin Guan was very curious. That scripture should have been memorized long ago, right?    

    

"My dear, I haven't seen you for so long. Did you miss me?" A voice came from behind him.    

    

Qin Guan turned his head curiously and saw Lisa. She was holding two sweater needles in her hands. She was actually weaving a sweater in her hands?    

    

"It's almost autumn. I was afraid you would get cold, so I learned how to weave a sweater. Take a look. How's my knitting?" Lisa took out the sweater in her hands.    

    

The color was bright red. In the future, men and women liked this color. However, in this era, there were very few men who wore red, right?    

    

Qin Guan looked at the sweater in Lisa's hand and said, "Yes, it looks very good, but only one piece is not enough."    

    

"My dear, then tell me, what else do you want?"    

    

"Blue, white, black, one piece each. And a hat, gloves, and a pair of sweater pants. Mm, the same color as the sweater. " Qin Guan said, "By the way, don't weave a green hat."    

    

If a person was bored, what could he do? He might as well try knitting a sweater.    

    

What the heck, it was definitely a good opportunity to waste his time. Now that he found out that Lisa liked weaving a sweater, Qin Guan was naturally very happy. Sure, you can weave a lot of sweaters. That way, you won't bother me anymore. Oh right, there are also some requirements for patterns and so on. In short, you can play by yourself.    

    

"No problem, my dear." Lisa was beside Qin Guan, weaving a sweater as if there was no one else around. At the same time, Qin Guan finally let out a sigh of relief.    

    

"System, come out."    

    

"Master, what orders do you have?"    

    

Master? When did you become so humble? What novel have you been reading recently? Don't look at those romantic stories, those about the palace, how nice it is to watch the war.    

    

"In the Money Graveyard, if I want to exchange for gold, what should I use to exchange for it?" Qin Guan asked.    

    

"Of course it's gold, wait for the quality to exchange." The System said, "Master, if there's nothing else, I'll go and study my maid cosplay."    

    

"Wait!" Qin Guan finally understood. This damn System, it has been playing cosplay recently, sleeping in the world of his imagination, what's the point?    

    

"If I want to exchange gold for gold, what use do I have for you?" Qin Guan was about to lose his temper at the system.    

    

"Oh, master, I might not have said it clearly." The System said, "It may not be completely gold, but gold can be used as well. As long as there is gold inside, when the System is exchanging, it can automatically be used to make a lot of money, if you are willing, you can go and make gold at any time. Let's go."    

    

Pure gold was extremely rare in nature. Due to the movement of the earth's crust and the changes in the geology over hundreds of millions to billions of years, the gold had been concentrated into gold mines. It often contained silver, copper, iron, palladium and other accompanying elements such as silver, copper, nickel, zillopium, selenium, ossium, and other such elements. 15% of natural gold was called silver gold, 20% copper was called copper gold, 5-11% palladium was called palladium gold, and more than 4% was called bismuth gold.    

    

In other words, gold of average industrial value was two to three grams per ton. There were 5-50 grams / ton of rich ores, 50-500 grams / ton of super rich ores. There was also a piece of gold, a dozen grams of the smallest piece, and a few dozen kilograms of the largest piece. A rare large piece of gold is a few hundred kilograms, because some of them look like a dog's head. It was commonly known as Dog Head Gold. If he could pick it up, he would definitely earn a fortune.    

    

Typically, it was a poor mine. It was 0.1-1 gram / ton. Generally speaking, 0.5 grams / ton or above had industrial mining value.    

    

Currently, there were definitely many gold mines in the country. Qin Guan would not be able to bring out his value if he went there. It was just to shorten the time. Therefore, if Qin Guan wanted to go there... He could only go to those poor mines that had no value for mining, and exchange the gold for it.    

    

When the quality was exchanged, the gold mine was exchanged for gold. If that was the case, he could give it a try.    

    

However, only 0.1 gram could be extracted from a ton of ore. If they had to exchange for a few tons of gold, wouldn't that be a mountain?    

    

When Qin Guan thought of this, he still felt like he was about to collapse. At this moment, Lisa, who was at the side, spoke.    

    

"Even if it's an exchange of quality, it doesn't have to be a corresponding element." Lisa, a woman from the renascence era, was actually very familiar with modern science. "For example, the molecular number of gold is 79. We can look for copper and tin. The atomic number is 29 and 50 respectively. The two of them are combined. Then we can make it to 79."    

    

What is matter? Matter is made up of atomic nuclei and nuclear electrons. The type of matter is determined by the atomic sequence, and this world is the opposite of the original world, but the basic principle is still the same.    

    

One is not possible, it can be replaced by two. It is absolutely not difficult to find a few hundred tons of copper and tin.    

    

"Can I?" Qin Guan looked at Lisa with joy. He could not help but shake her with his hand. Can I? Was it really okay?    

    

"Of course not, but you have to give me permission." Lisa said.    

    

The last time, Qin Guan was shocked when Lisa teleported out with a bra. After that, Qin Guan had the system block the loophole, and nothing could happen to him. Otherwise, what would Lisa do if she sent him out?    

    

Now, this was a big deal. If Lisa could solve this problem, the system's equivalent exchange could be changed in the future!