It was already late at night, but the palace in the middle of the East Palace was still brightly lit. Li Jiancheng was dealing with the candlelight while handling several emergency military information sent by Tuyuhun, including the dispatch of food and supplies, the collection of materials, etc. All of them need to be delivered to the front line of Tuyuhun in time so that Li Shimin's army can get the support of these materials in time.

Although their brothers fought fiercely in the court, when they encountered foreign enemies, the two brothers maintained a rare tacit understanding, that is, let go of all prejudices and agree to the outside world. For example, when Li Shimin was fighting outside, he would never drag Li Shimin down. When he governed the local area, Li Shimin would also cooperate with him with all his strength and would never let the local army make trouble for him.

It can be said that it was the tacit understanding between their brothers that led to the Tang Dynasty sweeping the heroes of the late Sui Dynasty in just a few years and finally winning the world. However, except for the stability within the Tang Dynasty, Li Jiancheng and Li Shimin felt that the tacit understanding between them was slowly fading, and no one knew how long their tacit understanding could last?

In addition, when thinking about Tuyuhun, Li Jiancheng couldn't help but think of another person, Li Xiu, who reminded Li Shimin in advance. Speaking of Li Xiu, Li Jiancheng's feelings for him were also very complicated, that is, he admired his talent, but was also annoyed that he refused to use it for himself.

Fortunately, Li Xiu did not surrender to Li Shimin either. Although he reminded Li Shimin of Tuyuhun this time, it is said that he only mentioned it accidentally while chatting with Qin Qiong and others, and then Qin Qiong told Li Shimin. Afterwards, Li Xiu did not show his intention to surrender to Li Shimin, which also made Li Jiancheng relieved.

It is precisely because of Li Xiu's performance on the above that Li Jiancheng admires his talent more. Even though Li Xiu had already entered Princess Pingyang's mansion to serve as a sacrificial wine, Li Jiancheng knew that his third sister had always been a bit laissez-faire generals. As long as they were willing, she would not care about anyone they defected to. So in Li Jiancheng's opinion, Li Xiu was still a target that could be fought for. He had always wanted to win over Li Xiu, but unfortunately he had never had a chance.

After finally finishing the last document, Li Jiancheng rubbed his swelling temples, closed his eyes and rested for a while before standing up. Then he moved his stiff body for a while, and then slowly left the hall, preparing to go back to his bedroom to rest. He had to attend the morning court tomorrow morning. Speaking of which, his father is old and his eyes are not very good, so many government affairs in the court fall on him.

However, before Li Jiancheng came to his bedroom, he suddenly found that there was a light on in a palace next to him. He was very familiar with this place. It was the residence of his second son Li Chengdao. Speaking of which, since his eldest son died, he has put all his hopes on this second son and has strict requirements on him, because if he inherited the throne, then Li Chengdao will be the crown prince of the Tang Dynasty in the future.

Seeing that the lights were still on in Li Chengdao's bedroom, Li Jiancheng was also a little surprised. He couldn't help but walk over. The palace maids outside the bedroom naturally did not dare to stop him, so Li Jiancheng could easily come to Li Chengdao's bedroom.

Under the candlelight, Li Chengdao did not sleep, but sat at the desk, holding a brush in his hand, as if he was writing something, which made Li Jiancheng stunned at first, and then nodded with praise. He had long known that his son was very smart, but being smart alone was not enough. He had to work hard to achieve something. Now it seems that his son is not inferior to anyone in his efforts. He can definitely be a good emperor in the future!

Seeing his son working so hard, Li Jiancheng was relieved and was less sleepy. He walked gently behind Li Chengdao, wanting to see what he was writing?

"In the extreme east, there is a big land called America, and there is a river on the continent, and the Amazon River..." Li Jiancheng frowned when he saw what his son wrote, and at the same time he couldn't help but recite it out loud. He thought his son was writing about some reading experience, but he didn't expect that what he wrote was something strange and strange, and his face was a little unpleasant.

"Father...father!" Li Chengdao suddenly turned around when he heard the voice behind him. When he saw that it was Li Jiancheng, he was immediately startled and stood up to salute him.

"Dao'er, what are you writing? Which gentleman taught you?" Li Jiancheng said with a gloomy face at this time. He knew that these things were not what Li Chengdao thought of, but they must have heard them from somewhere.

"Qi... Qibian father, this was when the child went to visit his aunt a few days ago. He happened to ask Li Jijiu for some questions. Later, when he was chatting, he heard Li Jijiu talk about these things. He felt interesting, so he recorded it!" Although Li Chengdao found that his father's face was a little ugly, he still told the truth. After all, there were guards around him that day, and as long as his father wanted to know, he would definitely not be able to hide it from him.

"Oh? Why did you go to your aunt's place, and how could you ask Li Xiu for questions?" Li Jiancheng couldn't help but ask in surprise when he heard this. He only knew that Li Chengdao studied with a few teachers, but he was too busy in normal times, so he had no time to care about what his son was learning?

When Li Chengdao saw his father's expression relaxed, he breathed a sigh of relief. He then went to Huangqu to inspect water conservancy that day, and then visited his aunt Princess Pingyang, and how he later asked Li Xiu about which longer, the Yangtze River or the Yellow River, and did not even hide the matters about America and Africa later.

At the beginning, when Li Jiancheng heard that Li Xiu was so clear about the length of the Yangtze River and the Yellow River, he was already very surprised. Then he heard that he knew even the longest river in the world, and even the extremely distant African and American continents. Li Xiu knew it very well. Li Jiancheng finally felt a little uneasy. These things seemed to be talked about at night, but Li Xiu spoke with reason and evidence, and it definitely didn't seem to be made up. But how did he know that the two places were thousands of miles away from the Central Plains?

Seeing the surprised expression on his father's face, Li Chengdao also felt very proud. This was the first time he saw his father showing such an expression. At the same time, he also admired Li Xiu even more. I am afraid that Li Xiu is the first person in the world who can make his father stunned.

After finally waiting for Li Chengdao to finish his speech, Li Jiancheng was silent for a long time without speaking. At this time, Li Chengdao suddenly had a flash of inspiration and said to his father with courage: "Father, Li Jijiu is the most knowledgeable person that the child has seen, so he wants to go to his aunt's place more in the future so that he can have the opportunity to ask Li Jijiu for more advice?"

When Li Chengdao heard that he wanted to ask Li Xiuduo for advice, Li Jiancheng was also a little moved. Li Xiu was not only knowledgeable, but also extremely talented. Otherwise, he would not have made him and Li Shimin compete for recruitment. If his son had more contact with him, he could have used it to win over.
Chapter completed!