The weather is getting colder and colder, and Li Su's matter can be regarded as coming to an end, at least after Zhang Nan and Li Su explained the matter clearly, Li Su still obediently said that he would not mention this matter to Comrade Li Er before the Tubo matter was completed.

Zhang Nan is also very satisfied with Li Su, who is so sensible and makes himself worry-free, Zhang Nan is most afraid that after explaining things clearly to Li Su, Li Su is still unrepentant, which is the most headache for Zhang Nan, but fortunately, Li Su is still a little sensible, and he is not stupid to fight Lao Li to the end.

Of course, before Zhang Nan left Li Su's residence, Li Su also asked Zhang Nan to take care of Dachi during this time, and Zhang Nan also patted his chest and promised to tell this lie beautifully.

After getting Zhang Nan's assurance, Li Su was relieved to let Zhang Nan leave.

"Whew, it's still good to have heating, you can touch it, this is still a little hot." At this time, Cui Yue was even more curious than Junyan and Zhen Zhen, standing next to the heater and touching the radiator without letting go.

"Really? Let me try. Li Lizhi also put her hand up with a curious look on her face, and then her face also showed a look of surprise.

"It's really as warm as Lang Jun said, but although there is temperature, our room is really a bit big, and it seems that only this part feels warm." Li Li asked.

"Normal, now it's just a test of heating, wait until you confirm that there is no problem with the entire heating pipe, this can be fully fired, although our house is big, but there is a lot of heating." Zhang Nan said while carefully checking whether the heating pipe in the house was leaking.

The rest of Zhang Nan is not afraid, what Zhang Nan is most afraid of is the water leakage problem, after all, there are two children at home, and safety is a big problem.

"By the way, Lang Jun, it's the Thousand Autumn Festival soon, does Lang Jun have any plans?" Cui Yue asked suddenly.

"Thousand Autumn Festival? What's that? Zhang Nan asked with a blank face.

"Lang Jun, you don't even know what the Qianqiu Festival is." Li Lizhi looked at Zhang Nan in surprise and asked, as if Zhang Nan was an alien. And Zhang Nan also shook his head, saying that he was not pretending to be stupid, but really stupid.

"It's my father's birthday." Li Lizhen was also speechless for Zhang Nan, a concubine, as a concubine, she didn't even know what the emperor's birthday was, which was really undeserved.

In fact, this is not to blame Zhang Nan, after all, Zhang Nan must have not known this thing in the first few years of Datang, and in the next few years, on Li Er's birthday, Zhang Nan either followed the army to climb the grass outside, or followed Comrade Lao Li to fight bloody battles in Silla, in short, every year when Lao Li celebrated his birthday, Zhang Nan would always miss it for one reason or another.

So it is understandable that Zhang Nan does not know about the Thousand Autumn Festival.

"The emperor still has a birthday?" Zhang Nan was shocked, he always thought that Comrade Lao Li was not a birthday, but he didn't expect that Lao Li would not respect his birthday, and it was a big special event, and even the importance of this festival was as important as New Year's Day.

"Of course, Lang Jun, don't say in front of your father that you don't know about the Qianqiu Festival, otherwise you will make your father angry again." Li Lizhi also hurriedly reminded.

In ancient times, the birthday of the emperor was regarded as a festival. The emperor's birthday was regarded as a birthday festival, and the rules for making celebratory ceremonies in ceremonies began in the Tang Dynasty.

To be precise, the inclusion of his birthday in the regulations started with Lao Li, Comrade Li Er attaches great importance to his birthday, and sets his birthday as the birthday, and the people celebrate the Thousand Autumn Festival.

Once on his birthday one year, Comrade Lao Li said to his eldest brother, the eldest grandson Wuji.

"Today is my birthday, and the vulgar cloud 'birthday is joyful', and I feel like it!" After saying that, tears were shed.

In addition, Comrade Lao Li also seems to have a different kind of feelings for his birthplace, in the years when Comrade Lao Li was the emperor, he returned to his birthplace in the sixth and nineteenth years of Zhenguan respectively, and made two poems by the way.

Although the two poems are not used to celebrate birthdays, both poems mention his birthday, which can also be seen that Comrade Li Er actually likes to celebrate birthdays.

"And how do you spend this birthday? Do you need to give a gift or something? Zhang Nan asked curiously.

It's not that Zhang Nan hasn't celebrated someone else's birthday, but it's the first time to celebrate the emperor's birthday, especially Comrade Li Er is still Zhang Nan's father-in-law, although Zhang Nan is not called Lao Li's father on weekdays, but after all, the relationship is here, and Zhang Nan is also half a royal person.

"That's for sure, birthday wishes, although the father did not ask the ministers to give gifts, but every day comes, the father will still feast the ministers in the palace, and the ministers will also bring their own gifts when they go, although it is not much precious, but always have to express their hearts." Li Lizhi also explained.

As soon as Li Lizhi said this, Zhang Nan knew what was going on with Lao Li's birthday, to put it simply, Lao Li would give the ministers a holiday when he celebrated his birthday, and in the evening, Comrade Lao Li would feast on the ministers in the palace, although Lao Li did not ask everyone to give him gifts, but no courtier who did not open his eyes would come empty-handed.

Of course, there are actually only so many courtiers who can eat with Comrade Li Er, and more of them are Comrade Li Er's concubines and children, as for other officials who are not in the stream, they completely treat this day as a holiday.

Although Comrade Lao Li's birthday was not as extravagant as the birthday of the Qing Dynasty emperor, he had to hold a golden dragon banquet when he invited his ministers. What is a super feast of 20 hot dishes, 20 cold dishes, 4 soup dishes, 4 side dishes, 4 fresh fruits, 28 melons and fruits, candied fruits, and 29 noodles such as dim sum, cakes and cakes.

There is no need for civil and military officials of local governments to set up incense cases and make a big salute in the direction of the capital to congratulate him on his long life, but the form that should be taken still has to go.

"So that means I'm going to give a gift to the emperor too?" Zhang Nan asked.

"It's not just you, I'm also going to give gifts, by the way, I just remembered when I said gifts, Lang Jun, do you have any good ideas? The two of us can give one together, and then this heavy responsibility will be handed over to you. Li Lizhen suddenly thought that she was no longer alone in giving gifts this year, and she could leave this troublesome matter to Zhang Nan to do.

Li Lizhi was immediately a lot happier.