In the process of stalemate with Changle, Li Chengqian promised countless benefits, and finally satisfied Changle, bouncing and greeting a group of little sisters, like locusts crossing the border, and even Xiao Wu, who was closer to Li Chengqian, did not stay.

Li Chengqian, who had been cleaned, had exhaustion and helplessness written on his face, and he felt that even if he dealt with that secret plot in Kaifeng Mansion, it was not so difficult.

However, when he remembered that Li Lizhi emphasized again when he was leaving, 'not allowed to marry Xiaosi', Li Chengqian began to feel a headache again, and he couldn't figure out what his sister wanted to do, why he had to connect himself with Cheng Xiaosi.

After thinking about it, I fell asleep unconsciously, and when I woke up again, I found that it was the second half of the night.

Sighing deeply and getting up from the kang, Li Chengqian was ready to carry out his new job - writing a book.

Unfolded a blank piece of paper, picked up a pen and wrote down five big words 'third-grade mathematics', pondered for a while, and added a 'next', and then nodded with satisfaction. Then there are the details of the four operations, including examples, formulas, and a series of other things.

This is a certain decision made by Li Chengqian after thinking about it for a long time, since he wants to be famous in Shilin, there is no doubt that publishing a book is the fastest way; And what books are available to everyone? Undoubtedly, it is the basic discipline; And what is the foundation that Li Chengqian is good at and everyone must learn from Datang? There is no doubt that mathematics in the six arts of the gentleman is.

With the convenience of Li Xiaogong's printing house, 'Primary School Mathematics' has been printed in four volumes, each with 10,000 copies, and the price is also very cheap, 20 copper plates per book.

Li Chengqian doesn't know how it was sold, but as far as Li Xiaogong said, it seems that he has not lost money so far.

This is already very good, after all, I didn't plan to make money in the first place.

Suddenly, Li Chengqian, who was writing with his head down, stopped his pen, turned his head to look in one direction, and said hesitantly in the puzzled eyes of the palace maid beside him: "Heizi, come out, don't hide." ”

"Your Highness, why can the minister be discovered by you every time?" Kuroko, dressed in black, walked out of the position where the candlelight could not shine, and asked with a wry smile with a gloomy aura.

"I've long said that you have to learn to observe your surroundings carefully, but I didn't tell you that you must use your eyes to observe, temperature, and air flow are also a kind of environment, but you don't need to use your eyes to observe."

Li Chengqian put the pen in his hand on the pen holder: "You came in through the window so aggressively, I almost didn't freeze to death by the cold wind, if I don't know that someone came in, then it's a ghost." ”

Heizi bowed slightly, a hint of admiration flashed in his eyes, and he said: "My subordinates understand, His Highness Xie instructs." ”

"If you want to be a top customer, then you have to learn to use everything around you, and at the same time pay attention to a lot of details, because many times it is not necessarily those key points that determine the success or failure of a thing, but also the details will determine many things."

Li Chengqian's expression was serious when he spoke, and in modern terms, he was very high-spirited.

However, this is taken for granted in the eyes of Kuroko, and even many times Kuroko will ignore the issue of Li Chengqian's age and treat him as his other master.

Because in Kuroko's opinion, His Royal Highness the Crown Prince can be called a top-level robber, although the force value is not high, but if he really wants to attack himself, he is afraid that he will not even have the strength to fight back.

This is the impression that Li Chengqian left on the sunspot for more than a year.

With the specious concepts that later generations saw in novels and movies, Li Chengqian's image almost became a god-like existence in Heizi's heart.

No matter what Li Chengqian said, Heizi would remember it very seriously, even if he didn't understand it at the time, he would remember it and follow it seriously.

As a consequence of this, when Kuroko recalls his past missions, he finds that he was lucky enough to be lucky at that time.

However, if Heizi said these words to Li Chengqian, Li Chengqian would definitely think that Heizi was very fateful both then and now, and it is really not easy to survive according to the methods in movies and novels.

After gossiping, Heizi brought the matter to the point: "Your Highness, the Khitan is here, led by a Qu Shuai." ”

"When?" Li Chengqian's eyes lit up and asked in a deep voice.

"I entered the city yesterday evening, and now I live in the inn." Kuroko hesitated for a moment and added, "Do you need to send someone to keep an eye on them?" ”

"No, you don't." Li Chengqian shook his head and denied the idea of the sunspot: "As long as you know that they are coming, it's good." ”

"Whoa!" Kuroko waited for a while, thought about it carefully, and finally made sure that there was nothing to report, and then said: "Your Highness, if there is nothing to do, your subordinates will retire." ”

"Wait." Li Chengqian waved his hand and signaled Heizi not to worry: "You know that Wu Chen is forming the 'Sixth Group', right?" ”

"Yes, my subordinates know, we met some time ago." Kuroko nodded and said.

"Then let your people cooperate with him, he is different from you, he is a gangster, he likes to talk about the righteousness of the rivers and lakes when he has nothing to do, let him pull up a team, I'm afraid that something will go wrong." Li Chengqian frowned and said.

"Your Highness, what do you mean ......" Kuroko wasn't quite sure what Li Chengqian meant by cooperation.

Thinking of all the strange things that Wu Chen did when he was by his side, Li Chengqian said helplessly: "Check the people under his hands and see what they do, Wu Chen's kid looks like a thorough spirit, but in fact, there is no reliable time." ”

"Your subordinates know what to do, please rest assured." Heizi also thought of the time when he was messing around with Wu Chen, and the corners of his mouth couldn't help twitching.

"Remember, you don't have the right to dispose of it, and you are not allowed to do anything other than investigate." This is the fourth time that Li Chengqian has reiterated his views to Heizi, and he does not want to have the same situation as Jinyiwei and Dongxichang during the Ming Dynasty in the future.

"Well, my subordinates remember." Kuroko nodded heavily.

Although I don't know why Li Chengqian has been emphasizing that the 'Seventh Group' has no right to dispose of it, this does not affect the work of the sunspot.

Although he is a murderer, it does not mean that he is a murderer, so Li Chengqian's restrictions did not cause any dissatisfaction among sunspots.

Of course, this is also because the 'Seventh Group' is not very strong now, and its tentacles are currently only around Chang'an, and even Luoyang has not touched it.

"Okay, you can go, if there is any news in the future, you don't need to run in person, the risk of entering the forbidden palace at night is not small, and the palace will never admit that it knows you if you are caught."

After finishing the matter, Li Chengqian had nothing to explain, and after making a joke casually, he let the sunspot leave.