Li Yuan said that Zhang Nan would naturally not take it to heart, because now Zhang Nan has more important things to do.

Zhang Nan accompanied the family to play mahjong after the sun was setting, because it was winter, it was dark early, and by the time Zhang Nan returned to the house, it was already dark. As soon as Zhang Nan entered the mansion, Cui Yue hurriedly ran out to greet him.

"Lang Jun, you're back." Cui Yue walked to Zhang Nan's side and asked.

Zhang Nan looked at his wife, who had been guarding the house, touched Cui Yue's face with a smile, and said, "After playing mahjong for a day, I'm still quite tired." Hungry, let's go eat. ”

Because Zhang Nan lost the card, it was really difficult for Cui Yue to show off his "brilliant" record today, so he had to pull Cui Yue to eat first.

Cui Yue saw that Zhang Nan didn't want to say more, and he didn't ask more, but a question rose in his heart.

"Who is Mahjong? Why hit him. ”

After Zhang Nan pulled Cui Yue to sit down, he took a few bites of food, and asked while eating, "By the way, is there anything going on in Yue'er's house today?" ”

Cui Yue remembered after Zhang Nan's reminder and said: "Something did happen in the house today, a few little eunuchs came to the palace, saying that they had moved the perfume making thing you made by Lang Jun at the behest of the queen's mother. ”

After hearing this, Zhang Nan nodded and said, "Well, I asked you to move, is there anything else?" ”

"Also, there is a letter sent by someone, saying that it was to be handed over to your husband, and the concubine didn't look at it, thinking that she would read it when you finished eating." Cui Yue said.

"Letter? Who will write to me? Zhang Nan looked strange, after all, there were not many people he knew in Datang, almost all of them were people in Chang'an City, and there were no people who needed to communicate by letter.

"The concubine didn't know, and the person who sent the letter said that he was also entrusted by someone, so the concubine accepted it." Cui Yue said.

"What about faith? Take it out and I'll take a look. Zhang Nan said.

"The concubine is in the room, Lang Jun wait, Qiu'er, go, get the letter in the room." Cui Yue instructed her personal maid, and after a short time, the letter was taken, Zhang Nan took the letter, opened it and slowly looked at it.

I saw the end all the time, Zhang Nan didn't understand what was written in this letter, I just didn't know what to do, although Zhang Nan's Chinese was not good, but I couldn't even read the sentences in the letter, and Zhang Nan could still read it.

"What is written in the letter?" Cui Yue asked with some curiosity, and leaned his head to this side while asking, hoping to see something.

"Totally ignorant of what to do, look at it." Zhang Nan said and handed the letter to Cui Yue.

Cui Yue took the letter curiously and read it slowly, and when she read it to the end, Cui Yue was also confused, and she really didn't know what was written in the letter.

"Look, you can't understand it, forget it, no matter, so be it." Zhang Nan said, not taking this matter to heart. Cui Yue heard Zhang Nan say this, so he had to put the letter aside and eat obediently.

After the meal, the two went back to their rooms to rest. And this strange letter didn't attract too much attention from Zhang Nan, after all, Zhang Nan is now full of things about how to design the Tiangong Department.

When it was time to go to bed, Zhang Nan stayed in the study for the first time and did not go back to his and Cui Yue's bedroom, Zhang Nan had already decided that this construction drawing would be designed by himself, and a lot of insurance measures must be added.

Sitting in the study, Zhang Nan had no idea at all in the face of the spread out A4 paper, after all, he studied computer science in college, not design, and now at best, he can draw a general appearance of the house, and it is still too difficult for Zhang Nan to mark the size or something.

"Ah, why didn't you learn something more useful?" Zhang Nan leaned on the leather seat he had replaced from the system and sighed, but the computer programming he learned was useless in Datang.

If he had studied civil engineering or something at that time, he wouldn't have been so troublesome now, Zhang Nan thought.

There was no way, bored, Zhang Nan entered the system and slowly browsed.

Suddenly, Zhang Nan seemed to remember something, and asked the system: "System, did I take a few tasks at that time." ”

"That's right, the host has taken a total of three tasks, one A-level, two S-level, and has completed two tasks so far, does the host need to withdraw the task reward?" The cold electronic sound still has not the slightest emotional color.

"If you don't say it earlier, tell me what the rewards are, you really are, I forgot that you have to remind me." Zhang Nan said with some reproach that if he had forgotten about this matter all the time, it was estimated that when he died of old age, he would not be able to see the reward of his task.

"The host can choose a task completion reminder." The system still threw the pot clean, without the slightest guilt.

"Alright, tell me what the rewards are." Zhang Nan asked impatiently.

"Among them, the A-level task to persuade Li Shimin to send troops to the Turks in winter has been completed, and the reward has been withdrawn." System Channel.

Zhang Nan thought about it, it seems that there is indeed such a thing, and this reward is the "kamikaze crossbow" that a large number of Datang soldiers have begun to equip now.

"What else?"

"Among them, the S-level mission has been completed to achieve the top merchant host of the Tang Dynasty within one year, and the S-level mission to help Li Shimin establish the empire on which the sun never sets has not yet been completed."

"Okay, don't tell me what you haven't done, just tell me the reward for the completed task." Zhang Nan has no interest in what he can't get for the time being.

"Is the host sure to withdraw the reward?" The system is still a tone.

"Withdraw and extract, I want to see what the reward is this time." After Zhang Nan finished speaking, the system took over the conversation and said: "The reward has been withdrawn, please exit the system to check it by yourself." ”

Zhang Nan exited the system and found that there was an extra small thing on his desk, Zhang Nan picked it up curiously and looked at it. Found that it was just a small model of a steam engine, Zhang Nan smiled, it is still very difficult to take advantage of the system, although Zhang Nan is ready to start researching this little thing, but this model Zhang Nan is not in the system can not be replaced.

"Forget it, it's for free anyway, don't give it away for nothing." Zhang Nan said.

In fact, according to Zhang Nan's idea, the best reward is to directly get yourself a set of experimental equipment, like a chemical laboratory, a physics laboratory or something, this is the best, and when you have the Tiangong Department that you have cultivated in Qinling, you will definitely have to establish these things.