The next day, Chai Lingyu did not go to the barracks, and she looked quite beautiful in the clothes of a woman.

Everyone gathered around a well, and waited lively, the craftsman had made the pump yesterday, and now it was put together, and then the water began to be pumped.

Of course, there is no electricity in this era, naturally it cannot be an electric water pump, Cheng Chubi makes people make a manpower pump, also known as a piston pump or suction pump, with manpower to pump the water up, the working principle is very simple, that is, the air in the copper pipe is evacuated, under the action of atmospheric pressure, the water is pressed into the copper pipe, and then the water can be pumped up, which is the same as the working principle of the syringe.

Soon, the water pump was installed, looking at the quaint copper water pump, Cheng Chubi was really happy.

"Quick, quick, pump the water up, pump the water up, and the time has come to witness the miracle." Cheng Chubi said happily, Cheng Tian hurriedly walked over, and then pumped hard.

Everyone looked nervously, but after a full half a column of incense, they were not able to successfully pump up the water in the well.

"Can you really pump water out of a well?" Chai Lingyu's brows furrowed slightly, and said, "After spending nearly a hundred yuan, you came up with such a thing?" ”

"No, according to the theory, it should be possible to squeeze the water out, right, what is the problem in that place?" Cheng Chubi leaned into the water pump, and his brows furrowed slightly: "What is wrong?" Could it be because the plug was turned into wood? Do you have to use rubber? ”

"No, there must be a problem, but what is the problem? What the hell is going on? It stands to reason that the water should be pumped out directly, but now there is no water at all? Cheng Chubi's brows furrowed slightly.

"It seems that this hundred dollars are wasted." Chai Lingyu shook his head and said.

"You try to pour water into it and see if you can pull it out. By the way, pour a little water first, squeeze the air clean, and then you can pump the water out of it, yes, it must be like this, it must be like this! Cheng Chubi said. Cheng Tian hurriedly brought half a bucket of water and poured it into the water pump.

"Quick, give it a try, it's okay!" Cheng Chubi said.

"Gollum~" Cheng Tian hurriedly tried it, and the water flowed out.

"It's out, it's out, there's really water coming out!"

"Really pumped out the water!"

"Maybe it's the water from just now."

"We'll find out later."

“……”

Everyone said, and soon, a bucket of water was full, followed by a second bucket, a third bucket, Cheng Tianyan was really happy, for these guys, this is definitely quite an interesting thing.

"It's a pity, hundreds of dollars have become such a copper bump, if you change it to a weapon, you can buy a good weapon." Chai Lingyu couldn't help but shake her head and said, in her opinion, the water pump that Cheng Chubi made out is useless at all, so it is better to replace it with a weapon.

"Money, the daughter is gone, come back, go, I'll take you to get rich." Cheng Chubi smiled slightly, took Chai Lingyu's hand and walked towards the treasury, opened the door of the treasury and walked in, which was full of copper coins and some gold and silver jewelry, including a lot of high-quality silk silk. At a wedding, Li Er gave a lot of things.

"See? See? There is so much wealth here, I can make the wealth here even more, hahaha......" Cheng Chubi laughed proudly.

"Huh?" Chai Lingyu's brows furrowed tightly: "Do you want to take out these silks and sell them?" No, this is a gift from His Majesty, and you can't sell it, and you, as a nobleman, can't do that merchant's thing. ”

"Pull it, it's still a nobleman, I've been married to you for a few days, and I haven't seen His Majesty give me a title, as far as I know, Chai Lingwu has been given the title of county duke before marrying Baling. And I don't even have a title except for a captain, what kind of nobleman am I? Cheng Chubi shook his head and said, "Forget it, don't talk about this, there are some things that should be mine and mine, not mine, and you can't get it if you force it, let's take a look at these gold and silver." ”

Cheng Chubi opened a box, took out a piece of pure gold horseshoe gold from it, and said with a smile: "Do you like golden gold, or this kind of dull gold?" ”

"The world loves gold." Chai Lingyu said.

"I've got a way to make this horseshoe gold look a little better." The smile on Cheng Chubi's face became even stronger: "By the way, let me ask, does Datang allow private coins?" ”

"If you dare to have a forger, you will die, and your family will be gone." Chai Lingyu said.

"It's a pity, it's a pity, if I can make it privately, I can turn a thousand into two hundred." Cheng Chubi sighed and said, "But even if I can't make coins, I still have a way to make these gold make gold and silver make silver." ”

Hearing that Cheng Chubi was going to say something confidential, Cheng Tiancheng hurriedly went out, guarded the gate, and did not let people approach.

"Add copper to gold, eight parts gold and two parts copper, and gold can become more golden and more beautiful, and you can turn ten taels of gold into twelve taels. Add tin to the silver, and you can turn ten taels of silver into twelve. If you can make coins, it will be much more profitable, put tin into copper to make it, eight parts copper and two parts tin, through raw pressure, into copper coins. It's a pity, it's a pity. Cheng Chubi couldn't help sighing, and said, "Why don't you go and talk to Your Majesty and let him allow us to mint copper coins, but we will share the profits with him." ”

"Are you going to rebel?" Chai Lingyu glared at Cheng Chubi coldly and said.

"If you don't allow it, forget it, let's recast all this gold tomorrow, and then we will exchange the same amount of minted gold with other people's thousand-foot gold, and wait until a few days to recast all the gold in Chang'an, and we will be developed." Cheng Chubi smiled and said, in this era of density calculation, even if Cheng Chubi adds another point of copper into it, they probably won't be able to find it.

"If that's the case, then give it a try." Chai Lingyu thought about it, and finally agreed to Cheng Chubi, after all, in this era, it takes money to raise soldiers, although her three thousand female soldiers are not much, but they also cost a lot of money every year, and Chai Lingyu is still a very ambitious general, three thousand female soldiers can't satisfy her at all, she wants to be like her mother, become a famous female general in history!

However, it takes money, lots and lots of money.