It has been about 200 years since Lu Ban invented the stone mill, but it has not been popularized among the common people, but is stationed in the courtyard of the deep house, and has gradually become a forbidden place for the nobility.

If you want to talk about the reasons, Qin Yu feels that there are two points.

The first is that the stone mill is a large stone tool, which is expensive and cannot be moved at will, let alone carried. If the people want to use a stone mill, the expensive cost alone can scare off 99% of the people, plus it occupies a lot of space, if you run away in the war, not to mention carry it with you, you have to be able to hide, right? Where to hide such a big and obvious size?

Anyway, so far, Qin Yu has only seen his own two stone mills the size of two people, he once asked Bo Niu if there are any smaller ones, Bo Niu said that the stone mills are so big, small? What can a small one be used for?

Second, the stone mill is to grind the grain into flour and eat, and it takes strength to push the stone mill. Not only for the Qianshou of the Qin State, but also for the lowest, the largest number, and the most exploited common people in the world, although the grains in the world are grown by them, there are not many that can be eaten in their mouths. Moreover, they only need to directly pound the grains, grind and peel them, and boil them to fill their stomachs, and even the mushrooms they eat most often can be boiled and eaten without grinding the skin, so why spend extra effort to grind them and turn them into more refined cereal flour to eat? It's not that they can't eat like this, it's just that there's really no need to spend more time and effort on it.

Just like their Xixiang, they are considered to be rich and wealthy townships with the most wheat planting and good harvests, but there are still many families who can only wrap their stomachs with beans and wild vegetables after paying taxes.

People don't even have anything to eat, so naturally there is no need for stone mills to process grain.

Since Qin Yu's family built two stone mills, the neighbors in their Artemisia just came to their house to see the rarity, and they were indifferent. It is said that they can go to Qin Yu's house to grind beans, Qin Yu's homework is done, just waiting for them to copy it.

However, it didn't.

It's still that reason, pushing and grinding is laborious, Qin Yu has livestock at home to help, if they go to use stone grinding, they can only use manpower to push, it is laborious and not cost-effective.

Moreover, Qin Yu has already given them the method of raw bean sprouts, and the more they eat, they will not need to grind the stone.

Moreover, if they want to eat wheat flour or soybean flour, they can take the wheat and beans to Qin Yu's house to exchange, the Qin family is generous, a bucket of wheat can be exchanged for a bucket of wheat flour, and they don't have to grind the flour, so it is their neighbors who earn it.

In fact, they did not know that the wheat they sent was going to produce wheat bran after it had been ground in a stone mill, and that this wheat bran was the best feed for his poultry.

For all these reasons, it is normal that stone grinding has not been popularized among the poor people.

And these disadvantages of stone milling, in the eyes of the nobles, are simply not worth mentioning. Therefore, the nobles may be able to see stone mills everywhere in their homes, and they can eat fine food ground with stone mills, but among the people, it is rare.

But what if the people spent less effort on the stone mills than they gained?

Everything that is profitable is the most violent way to promote explosively.

For example, after the owner of this shop found that liquid soybean milk can be turned into solid bean curd to fill his stomach, he quickly thought of improving the bulky and difficult to operate characteristics of the stone mill, making it small and exquisite, which can be operated by a single person, grinding a small amount of soybean flour, and then boiling it into soy milk, adding salt and brine to point out the bean curd, and then filling the stomach.

After slimming down the stone mill, not to mention the convenience of moving anywhere, even a frail woman can grind some grains for her family every day to improve her diet.

Qin Yu looked at the stone grinding behind the owner of the shop, which was a little rough in workmanship, and was shocked by the cleverness of the owner of the shop, but also a little incredulous.

He asked Su Lian: "Su Lian, is it common to eat grinding beans into soy milk in the township?" ”

Su Lian smiled: "Before the little master grinded out this soy milk, Su Lian had never heard of such food. ”

Oh, so grinding soy milk was his first creation?

Qin Yu: "I remember, I only came up with this method of grinding soy milk the year before last, right?" ”

Su Lian: "Actually, it was after the spring ploughing last year that the old housewife invited the neighbors to enjoy the bread feast at home, and it was only after that that the old housewife taught the neighbors the method of grinding soy milk." ”

After last year's spring ploughing, after this year's spring ploughing, for a whole year, after Qin Yu lost interest in beans, he stumbled upon the street selling soybean milk and stone grinding, and someone had already pointed out the bean curd. Although this person directly grinded dried beans into soybean flour, and then sprinkled them in a clay pot to cook them into soy milk, and did not filter the bean dregs, it is undeniable that he did succeed in ordering the bean curd.

But it's just bean curd, and judging by this man's high interest in selling his stone mill wholeheartedly, he shouldn't have thought about pressing out the tofu further.

I just don't know if this method of grinding soy milk is the only one who is interested in soy milk, or if it has spread in the capital.

Qin Yu sighed at the wisdom of the working people for a while, while thinking that since the slimming stone mill has come out, he also has the inspiration for some tofu, and when he makes the tofu, only the tofu itself will be examined, will it interest the people of Qin State?

If every household can eat hot tofu made from cheap beans, will the government collect taxes on this tofu?

If tofu is on the table of the nobles, what kind of impact it will have on the poor, whether it will increase the status of soybean in grains, and whether the Qin State will increase taxes on soybean, these Qin fish do not know.

But if he hesitates because of unknown difficulties, that is not his style of doing business.

Qin Yu: "Su Lian, you go to this master's house to buy a few small stone mills, and then ask him how he thinks of adding salt and brine to the soy milk?" ”

Su Lian was ordered to ask the boss who sold the stone mill, while Qin Yu sat on his strong shoulder and probed his brain to see the bowl of semi-finished bean curd with Huang Bulaji.

Zhuang was a little nervous and persuaded Qin Yu: "Little master, this food is not clean at first glance, when I go home, Zhuang will grind for the little master, let's make it ourselves, okay?" He saw Qin Yu's curiosity about what bean curd was, so he thought that he wanted to eat it himself, and he was afraid that he would eat something bad again, so he tried his best to persuade him.

Qin Yu touched his big head melon and said with a smile: "His method of grinding soy milk is not right, when I get home, I will make it for you to eat, and I guarantee that it is better than his." ”

Zhuang was happy, as long as the little master didn't eat unclean food outside, he could do whatever he wanted.

is also watching the strange Jiaojiao Yeyan on the sidelines, and she is also discussing this bowl of bean curd.

Yan was very angry: "This person, hmph, I don't know where he learned this method of grinding soy milk, he learned it half-heartedly, and it was wrong from the beginning." To grind soy milk, you should soak the beans overnight, and wait for the bean skin to soak and stretch on the second day, and then grind it twice to make the pulp delicate and moist, and then filter out the bean dregs, at this time the soy milk can be entered. ”

Jiaojiao said: "They are just hearsay, and it is already very good to be able to learn like this." ”

Someone next to him heard the conversation between Jiaojiao and them, and couldn't help but ask curiously: "Those two little children, is it possible that your family will also make this belly-filling bean curd?" ”

Yan Wenyan's face turned a little red, and he said a little aggrieved: "...... No. ”

She just said that she only said grinding soy milk, okay? She didn't say grinding bean curd, this person really doesn't have ears.

Jiaojiao saw that this person was tall and spoke roughly, so she hurriedly pulled the cigarette and hid to the other side of Zhuang, who was also busy moving his body, carrying Qin Yu forward two steps, and the other servants who were guarding them also stepped forward, and Gu Du squinted to look at the person who spoke.

Although this person is not as strong and burly, but in the crowd, he is also tall, if it is one-on-one, he is naturally not afraid, but there is more than one strong person who squints at him here.

Seeing that Qin Yu and his party were not easy to mess with, he laughed twice, hurriedly performed a courtesy with a fist, and then withdrew from the crowd and turned around and ran.

Qin Yu: ......

Well, I've become a street fighter by accident!

As soon as the man ran, Su Lian returned, bringing with him five small stone mills of various sizes.

Su Lian whispered to Qin Yu: "It's just a coincidence. ”

Coincidental?