No matter what Li Erda's idea is, but since he said it, Li Yuanjia must not slack off.

And he also felt that this was a good opportunity for the prince to learn something - he didn't care if Li Chengqian would be demoted to a commoner in a few years, after all, this kind of thing has happened, and who knows the future history? What if his butterfly wings are powerful enough to fan Li Chengqian onto the emperor's throne?

So early the next morning, Li Yuanjia asked people to send four math books to the prince.

One is dedicated to "Tianzhu Numbers", and at the same time elaborates on the decimal system, as well as the new length measurement unit of Hanwangfu based on the decimal system. Datang uses the decimal system in many places, so it is very simple. In the other three books, one is dedicated to the four operations, one is about integers, decimals, fractions, percentages and proportions, and one is a little more high-end, which is about unary equations and binary equations!

In this era, it is the problem of chickens and rabbits in the same cage in "Sun Tzu's Sutra".

There is no doubt that this one is very high-end.

It's hard for ordinary people to do, and even a lot of mathematicians don't necessarily solve it well. But in Li Yuanjia's book, you can easily solve the classic problems in "Sun Tzu's Arithmetic"!

He didn't know if Li Chengqian would be really interested, and Li Yuanjia wasn't even sure if the prince would read these books seriously, but giving Li Chengqian a few books was nothing more than asking Chunyan and them to copy more books.

So whether it's useful or not, these books Li Yuanjia let people send them over. Along with the basic math book, there is also a stack of drawings, detailed drawings of the new type of rollover! Not only the overall structural drawing, but even each component Li Yuanjia has drawn a detailed structural drawing! On these drawings, the dimensions of each component are clearly marked in new length units.

In case the Tang prince is interested, the benefit will be greater......

After the book was delivered, Li Yuanjia was born.

He couldn't be restless, because as the wedding date approached, the people sent by the clan had already taken over the Han Palace, and even the housekeeper Han Shan had to step aside! In addition to Li Yuanjia, who has to take time out every day to consolidate the etiquette training on the wedding day again and try on the finalized wedding dress, the final guest list and their seats, as well as the dishes of the day, must also be reviewed.

Although there are people from the clan who specialize in organizing weddings to help, there are some lords who dare not do it.

For example, the wedding banquet dishes of the day, who doesn't know that the stir-fry of Han Wangfu is a must in Chang'an, and it is highly respected by the royal family and officials, who dares to pretend to be an expert in front of others?

In addition to Li Yuanjia's busyness, the palace was also carefully arranged up and down.

The prince's wedding has its own rules, which are basically ready-made things, and Li Yuanjia didn't plan to be an outlier, so he naturally let them toss. However, as a traverser, he was still a little unwilling after all, so he finally took out the things that he had prepared for a long time......

"King, this is the final menu!"

On May 14, when the menu in his hand was handed over to Li Yuanjia, Yu Niang's face began to be slightly blessed, but her increasingly white face was shining, and she said excitedly: "Eight cold and eight hot, two soups, four pastries......"

For Yu Niang, three days later will be the pinnacle of her life!

Especially when I thought that the clan was planning to send the chef in the palace to prepare for the wedding banquet, but the king choked back with a sentence of "On cooking, who is comparable to my jade girl". Now there are dozens of cooks in the house, all of whom obey her orders, and I am afraid that this glory will not be touched in a lifetime!

"Uh...... Pretty good. ”

Looking at the menu in his hand, the corners of Li Yuanjia's mouth twitched, and he nodded helplessly.

If the wedding banquet is the kind of round table meal in later generations, of course, there is nothing wrong with this menu, and it is even a little shabby. After all, it is the wedding of the prince and the eldest daughter of the prince, and it is natural to be extravagant. But don't forget, it's the twelfth year of Zhenguan, and the Tang Dynasty still implements a meal sharing system!

A small table for one person, the kind where everyone sits separately!

In other words, these dishes, soups, pastries, etc., must be served on every table!

When this number came out, Li Yuanjia had a headache when he looked at it.

Although he Han Wangfu has no connections in Chang'an Mansion, and he does not invite many guests, don't forget, Princess Han is the eldest daughter of Fang Xuanling - Lao Fang's prestige and connections during the Zhenguan period are far from being comparable to him as a prince.

Even if the low-status people are not qualified to come, there are at least two or three hundred guests!

Eight cool and eight hot, two soups and four pastries?

Needless to say, this set of dishes alone costs thousands, right?

To tell the truth, Li Yuanjia really wants to make a round table meal. Make dozens or hundreds of large tables for him, and then have people cook some large plates and soup pots, so that the space alone can save more than half. But this kind of good thing is just thinking about it, if you want to change the banquet system for thousands of years, Li Yuanjia doesn't have the courage or qualification!

can only wait for the tables and chairs to become more popular and slowly become mainstream......

Several thoughts flashed in his heart, Li Yuanjia checked the menu again, and after making sure that Yu Niang didn't get dizzy and put pork and other cheap meats in, he nodded and finally made a decision: "Okay, Yu Niang, just prepare according to this menu...... Are you all ready? ”

"Don't worry, the king has already prepared!"

With a slight glow on her face, Yu Niang nodded again and again: "And there are more than a dozen butchers ready, just waiting for the wedding day!" ”

Han Wangfu cooks, and the fresh word is the head.

Especially on the day of Li Yuanjia's wedding, naturally you can't use cured meat or anything, and it must be mutton, chickens and ducks that are freshly killed on the same day - Yu Niang has been saving up a lot of energy since very early on, and wants to open the eyes of those dignitaries and nobles in Chang'an City who have not seen her craftsmanship!

Seeing that Yu Niang was so excited, Li Yuanjia shook his head helplessly and hurriedly sent her away.

As the cooking Yu Niang left quickly, Li Yuanjia soon saw Han Lucheng who was busy directing people to work next to him, and quickly beckoned and shouted: "Han Lucheng, come here!" ”

"What do you command, my lord?"

After trotting over, Han Lucheng resisted the urge to wipe his sweat, and asked his luggage.

Glancing at him, Li Yuanjia asked, "Lu Cheng, can you see the new wine I let people brew?" ”

Han Lucheng nodded hurriedly, then hesitated and asked, "Back to the king, I have seen it." It's just that...... King, there are only forty jars of wine, will it be less? ”

"Haha, how can it be less?"

Looking at Han Lucheng, who was worried, Li Yuanjia grinned and said, "That's the new liquor I specially made people, if it can be used up at the wedding banquet, then those people are really capable......