On the way back, Liu Fan looked at the things in his hand while thinking about things, and when he arrived in the village, there were naturally children with him to eat, Liu Fan really didn't have anything to give, so he blew the children away.

When he got home, Liu An looked at the things in Liu Fan's hand, immediately pulled Liu Fan aside, and said in a low voice and anxiously: "Brother, where did you get it!" ”

"Go into the city, take a walk, my uncle gave it!" Liu Fan casually put things aside.

Liu An hurriedly said: "Brother, are you stupid, if you let your father know, you will definitely break your leg!" ”

Liu Fan smiled and said: "This house is empty, there is nothing to eat, now take something back, it can be regarded as subsidizing a store, besides, if you don't say it, I won't say it, Aya doesn't know!" ”

Liu An frowned, thought for a while and said, "In this way, let's hide the things first and save some use!" ”

Liu Fan nodded, then rubbed Liu An's yellowed hair and said, "Everything in this is at your disposal, but I have useful for this salt and sugar cube!" ”

Liu An blinked, looked at Liu Fan and said, "Brother, what are you going to use it for?" ”

"Brother wants to make a fortune!"

"Do you make money?"

"Make money, uh, it should be profitable!" Liu Fan said with some uncertainty.

Liu An looked at Liu Fan suspiciously and said, "Brother, aren't you kidding me!" ”

"Hahaha, fart, go and go, while playing, I'll figure out how to get it!" Liu Fan drove Liu An away, and then walked to the side and studied it with a salt cube.

The salt cube is black, and it is also the mainstream edible salt on the market, this thing is basically used every time you cook a little, in the Tang Dynasty, pork, chicken, duck and fish are not considered real food, but can only be regarded as decoration, because there is no good way to make these kinds of food, civilians eat more, and the aristocracy is still mainly mutton.

Now that Li Er has just taken the throne, the political situation is unstable, and there are many rebellions everywhere, but under the leadership of this extremely luxurious and united leadership, Datang has gradually performed the rule of Zhenguan.

The market is gradually heating up, although the trade of goods is in the early stage, but there are also some families slowly emerging, in the face of this large-scale trade began to have the emergence of money, but the internal use is more.

What Liu Fan wants to do is to make salt and sugar closer to modern society, which is the so-called purification.

Purification does not require any special equipment, I learned it in junior high school, simple charcoal and some gauze, you can purify it, although it is not as crystal clear as modern society, but it is not much the same.

took out the salt cubes at home, and put a few salt cubes sent by He Luofeng together, and began to build a simple funnel and filtration device, but he couldn't find gauze, so he tore off some of the clothes on his body and superimposed them on top of each other to filter.

Throw the salt cubes into the pot, add some water, make a fire, boil, then wait until it cools, put it out with a gourd scoop, and take out some of the carbon in the pot hole to cool, and then start to filter after cooling.

After filtering it over and over again, soon the originally black salt water became pure, and when it couldn't be more pure, Liu Fan put it aside and let the sun shine, waiting for the salt to dry naturally.

Lying on the stone pier, Liu Fan looked at the clouds rolling in the sky, these clouds will be a little strange, one will become the appearance of a family, one will become a modern steel monster, and another will become his hometown, except for the sour eyes, everything is fine.

Rubbing his eyes, the afterglow of the setting sun made Liu Fan a little hungry, got up, and came to the place where the salt was placed.

The water has almost evaporated, but the salt now, like porridge, still needs to be exposed to the sun, but the sparkle is already visible.

"It's done!" Liu Fan breathed a sigh of relief, this thing is estimated to be able to sell at a good price, and I don't know what the market price is now, and I don't know if there is sales, the key is that if the sales volume is very objective, I don't know if there will be any risks, after all, in this kind of bird society, killing people is the same as commonplace.

Especially a servant like himself and has a history of rebellion, if he dies, he will die, and there is no one to do.

Frowning, he carefully set the salt aside, covered it, and began to make dinner.

Liu An, this girl, went out to play crazy for a long time, and when she came back, her face was gray.

"Ran there again!" Liu Fan asked casually.

"Catch rabbits with Brother Big Bull, hehe!" Liu An himself brought a bucket of water from the well and said while washing his face.

"Looks like I didn't catch it!" Liu Fan said while stir-frying.

Liu An frowned cutely and said, "No, I caught it, it's just that this rabbit is pregnant with cubs, let's release it again!" ”

Liu Fan gave a thumbs up, just worried that the big cow would be beaten when he went home, and finally caught a rabbit to eat some meat, and was released.

The meal was ready, brought it in and gave Liu Qingshu a little food, and then the brother and sister began to cook.

Datang actually doesn't like to eat three meals, normally it is two meals, one is eaten at about nine o'clock in the morning, called morning food, and one is eaten when the sun goes to the southwest corner, called morning food, and after eating, go to bed.

But Liu Fan couldn't help it, he was used to eating between six and eight o'clock in the evening, and he was easy to get hungry if he ate too early, so he even took Liu An to eat with him.

There is no nightlife in the countryside at night, especially in the countryside in this era, as soon as you eat dinner, you make babies, you steal things, you sleep, you don't have any nightlife.

Liu An was ready to go to bed after taking a bath, but was called by Liu Fan, the moonlight was very bright today, Liu Fan wrote some numbers on the ground and said to Liu An: "Oh, this is 1 to 10, you remember, I want you to write it out silently in two days, if you can't write it silently, hehe, don't eat it!" ”

The little girl frowned and looked at the strange numbers on the ground and said, "Brother, what is this!" How have I never seen it! ”

"These are called Arabic numerals, this is 1, this is 2.... This is 10, it's very simple, right, people's fingers are 10, and so are the toes, this is a set of basic numbers, and I will teach you other numbers later, in short, memorize it first, and then write it out, and use it later! ”

"Well, then brother, what is Arabia, and which uncle is Arabia...."Liu An raised his head and asked.

Liu Fan paused for a moment, looked at Liu An's bright eyes, and said after a while: "Arabia is a very distant country, bigger than our Tang Dynasty, this is their civilization, and it is also their number, of course, we also have it, but it is not very convenient, so it is more convenient to use this kind of number!" ”

If it is really calculated, Arabic numerals were not invented by the Arabs, but the Arabs conquered the Punjab region and discovered this kind of mathematics that is more advanced than them.

Liu An nodded as if he didn't understand, then squatted on the ground and memorized the numbers, memorized them for a while and began to imitate and write.

Liu Fan stepped aside, looked at the bright moon and said slowly: "Today's people don't see the ancient times and moons, and this moon once shone on the ancients." ”

Inexplicably crossed, inexplicably came to Datang, it's really... Fuck it!

"Brother, what are you talking about?"

"It's nothing, reciting poetry!" Liu Fan said casually.

"Reciting poetry? What poems to read? ”

"Hey, if you remember the numbers, you will ask, hurry up and memorize it!" Liu Fan aired.

Liu An nodded obediently and wrote again.