"Huh? Didn't Lizin go out? ”

Seeing his wife at almost dusk, Changsun Chong was a little surprised, blinked his eyes and asked with a smile: "Didn't you say yesterday that you were very interested in that club and plan to go again?" ”

Putting down the account book in her hand, Li Lizhi said with a wry smile: "Not today, there are many things to do...... Hehe, even if it's really good over there, it's okay to go once in ten days and a half months, where can I go every day? ”

“…… Also. ”

Raising his eyebrows slightly, Changsun Chong nodded with a smile and said, "But if you are usually free, you can indeed go and relax, at least the big landlord is really interesting." ”

Now his father, the eldest grandson Wuji, and his mother have gone to Jiucheng Palace, and the eldest grandson Chong himself has to "go to work" every day, and he has to read and write after "getting off work", and he basically doesn't care about the trivial things at home, so most of them are now managed by Changle. It doesn't matter if you go out for a day once in a while, if you really go out every day......

Actually, it's nothing, there are still people in charge of the family, but it's not good after all.

So after smiling, Changsun Chong didn't say much. In fact, he didn't have any opinion on what club his wife went to, after all, there were only women there, and they were all noblewomen in Chang'an, so there was no harm in having more contact. Although the eldest grandson Chong is quite proud of himself and does not look down on some meritorious children, as the eldest son of Zhao Guogong, he understands the importance of connections in the DPRK and China very well!

The emperor's favor is one thing, but if there are no other allies, the eldest grandson Wuji can come so far?

Don't be funny.

Of course, Changle didn't know what Changsun Chong thought, she just pursed her lips and smiled: "Although it is indeed unbearable to repair the house and collect tolls, it is indeed very fast to kill time...... Hey? Okiro, what are you holding in your hand? ”

Blinking her eyes, Li Lizhi asked with some curiosity.

Changsun Chong just came in from outside, holding a small cloth bag in his hand, boxy as if it was holding a book?

"Hehe, I just went to the Xinhua Bookstore in Dongshi to buy it!"

Reaching out and sending the cloth bag to Changle's hand, Changsun Chong raised his eyebrows and smiled: "It's the book "Mathematics" written by King Han, which also talks about Tianzhu numbers and how to calculate them...... Speaking of which, I used to get a copy before, but I looked at it casually at the time, and I didn't know where to throw it away because I wasn't interested. ”

"Oh? Mathematics? ”

After listening to her husband's words, the corners of Li Lizhi's mouth twitched, and her brows suddenly furrowed.

Li Yuanjia, the king of Han, wrote a set of "Mathematics" by himself, and asked people to make engraving and print it, and sell it in Dongshi Bookstore, and not many people in the entire Chang'an City knew about it. After all, a prince opened a bookstore to sell books and paper, and this kind of thing is really not very nice to say.

But for people like Changsun Chong and Li Lizhen, this matter will naturally not be a secret.

For a long time, Li Lizhen was reluctant to mention it.

After all, it was her uncle, even if the age difference between the two was a year or two...... So her uncle's business is naturally a bit of a headache for her, not to mention that he also wrote such a set of "Mathematics"!

Can the word "learn" be used casually?

Although this set of books has been quietly put on the shelves for sale, and the Xinhua Bookstore has not shouted with great fanfare, who who does not laugh at it in private when they hear the news?

Anyway, as soon as she heard her husband talk about it, Princess Changle's expression immediately changed slightly.

"Yes, math!"

Of course, Changsun Chong didn't understand this, so he didn't care about Li Lizhi not reaching out to pick up the cloth bag, and opened it himself, took out a book from it, and then chuckled: "To be honest, I've always felt that this set of books is ...... Well, it's hard to read, until not long ago, His Majesty handed over the matter of the overturning workshop to King Han! So after playing Big Landlord once yesterday, I specially asked people to go to the East Market to buy a copy and come back, wanting to study it well! ”

"Dump workshop? Is it because of this set of books?! ”

Li Lizhi can not care about games like big landlords, but when it comes to overturning workshops, she can't help but take it seriously.

"Well, yes."

Taking a deep breath, Changsun Chong's expression became a little more serious: "Except for the people of Han Wangfu, no one can make a hundred carpenters build three hundred overturned cars in a month...... And according to the king, all the ways can be found in this set of books! So I wanted to try to read it. ”

“…… Well. ”

After pondering for a while, Li Lizhen also had to nod slowly, and said in a low voice: "Actually, I have heard the second brother talk about this set of books, and he thinks it is very interesting......

"Second brother...... King Wei? ”

"Yes, that's him."

Seeing her husband's surprised look, Li Li smiled and said, "And the second brother has already finished learning this set of books, and once even told me that he planned to follow the example of the Eleventh Emperor Uncle and use this Tianzhu number in the Wei Palace...... Chong Lang, do you think that Uncle Eleven made this big landlord game, as well as cards or something, just to let more people use Tianzhu numbers to learn this set of "Mathematics"? ”

As soon as he was halfway through the matter about King Wei, Li Lizhi suddenly changed the topic.

"This ......"

After hesitating for a moment, Eldest Sun Chong shook his head with a wry smile: "I'm really not sure, but it's just a guess." Fortunately, these six books are not too thick, so let's read them first......"

……

"Shopkeeper, bring me a set...... Well, that's the book of arithmetic! ”

A man in his forties hurriedly walked into the door of Xinhua Bookstore, ran directly to the counter, and then shouted loudly.

"...... Math?"

After being stunned for a moment, Liu Zhicheng's eyelids jumped, and then he asked rhetorically.

Mathematics...... That's right, it's Math! ”

As if his words reminded the other party, the middle-aged man hurriedly nodded desperately: "It's this set of books, hurry up and get me a set, my master is waiting to read it!" ”

As he spoke, the middle-aged man looked in the direction of the door, his face was indeed quite anxious.

Liu Zhicheng understood the other party very well, so he hurriedly went over and took a set of "Mathematics" for the other party, and then couldn't help but ask while collecting the money: "This guest officer, can you let me ask, how did you know that we have a set of books on "Mathematics" here?" Why come and buy books today? ”

"Huh? What's wrong? ”

After being stunned for a moment, the other party frowned and asked.

"Hehe, nothing."

Quickly shaking his head, Liu Zhicheng explained: "I just think it's a little strange." In the past, it was not possible to sell one set in ten and a half days, but yesterday three sets were sold in one day, and today ...... You're already in second place! ”

Hearing him say this, the middle-aged man was immediately happy: "The reason for this is that the shopkeeper doesn't know?" ”

"I don't know, I asked the guest officer to help solve my doubts."

"Hehe, I don't know!"

“……”

While Liu Zhicheng's face darkened, the other party laughed and said: "I don't know what the master of the family thinks, suddenly let me buy such a set of books, but it's a good thing to come to business......"

At this time, a young Lang Jun suddenly walked in from outside, and said urgently as he walked: "Shopkeeper, the set of "Mathematics" I bought here last time, is there still one in the back?" ”