After Wang Haoran returned to Zhongcheng, he devoted himself to the study of fuel power, just like a retreat and cultivation, except for a trip back to Chang'an during the Spring Festival, the rest of the time was basically in the research room. It's not that he is in a hurry to study it, but the difficulty of this research is very great, whether it is precision or material, equipment requirements need to be greatly improved, which makes the progress of the research very slow, although Wang Haoran roughly knows the principle of operation, but the specific details still need to be groped forward, this road that needs to cross the river by feeling the stones, and now only Wang Haoran has more ways to figure it out.

During this time, there were some hot topics, such as the widespread use of Eucommia ulmoides rubber products, the rise of the manufacturing industry, Li Chunfeng led Wang Jingxiu and others to mobilize the people to measure the ecliptic and equator, and the most important news was the triumphant return of the Japanese soldiers.

At this time, the Fukuda family had overthrown the Soga clan and controlled the entire Wa Kingdom. Of course, this is inseparable from the support of the Tang Dynasty, so it is logical that the Wa Kingdom will be attached to the Tang Dynasty. However, Li Shimin did not want the Futian family to control the Wa Kingdom as a royal family, if it was like this at the beginning, it would be difficult to turn it around in the future, so Li Shimin's meaning was to let the Wa State directly cancel the name of the country, in the name of the Tang Dynasty, Futian Zangcun was named the Wa King, hereditary replacement, and became the governor of the Wazhou Prefecture, and Fukuda Eiichiro was also an official in Beijing, and it is not good to say that he stayed in the Tang Dynasty as a hostage.

The Futian family is naturally unwilling, but after more than a year of civil war, the domestic materials can be said to be exhausted, if they refute Li Shimin's request, without the material assistance of the late Tang Dynasty, the Futian family is afraid that it will not be long before the king is called, so they can only agree, but also a thanks.

Naturally, the imperial court did not send officials to the Wa State to reside, but there was no Maoren tribe, this was discussed by Datang and the Maoren tribe a long time ago, and Datang would never interfere in the internal affairs of the Maoren tribe, and Li Shimin also promised to give some support. It's not that Li Shimin doesn't want to plant the Tang Dynasty banner in the Maoren tribe, it's just that there is not much of a problem with whether the Maoren tribe is submissive, and there is no need to be infamous for treachery. Moreover, Li Shimin got inspiration from the policy towards Gaochang back then, and thought of a more appropriate way to surrender, although it would take a few more years, but fortunately, there was no need to work hard in this method, and it could even be said that it was unintentional.

In the Wa Kingdom...... No, it should be said that it is Wazhou now. In Wuzhou, there is a name known to women and children, that is, the Ten Tiger Generals of the Tang Dynasty, after the Tang Dynasty gave them the titles of ranger generals and guerrilla generals and hyped them up, the people of Wuzhou were even more regarded as gods.

After all, Wazhou and the Tang Dynasty are separated by a vast ocean, and if Wazhou is a little stronger, it is not impossible for them to become Waguo again. So before that, Datang must strengthen its control over Wazhou. After deliberation between the ministers of the DPRK and China, they unanimously agreed that it was necessary to strengthen exchanges between the two places, so that the Tang Dynasty could infiltrate the economy and culture into the state, and even become the mainstream. As soon as this plan was decided, the improvement of navigation technology seemed imminent.

Some courtiers suggested that the imperial court had several shipyards, and Wang Haoran had advanced technology and technical personnel, and Wang Haoran had long had the intention of building a shipyard, and suggested that the imperial court could cooperate with Wang Haoran to build a new shipyard, which could greatly improve the progress of improvement. Although Li Shimin also knew this, but hesitated, if he and Wang Haoran jointly built a shipyard now, then Wang Haoran would definitely go to Hangzhou early, which was nothing, but the problem was that Li Tai would definitely follow, Li Shimin was very reluctant, so he put this proposal on hold.

Those ministers who advocated that the four princes go to the fiefdom as soon as possible would not miss this opportunity, and they all supported the joint venture with Wang Haoran to build a shipyard, and some even mobilized Empress Changsun to blow the wind in his majesty's ears. Empress Changsun is a very assertive and insightful person, she can naturally guess the intentions of these ministers, but she does not want to create an atmosphere where the ministers protest and His Majesty acts alone, so she told those ministers about the affairs of the court, and it is not easy for her harem to intervene, but she decided to mention her opinion to Li Shimin in private, because she felt that as long as she and Li Shimin were willing to let go, with Li Tai's intelligence, they would definitely be able to achieve a great cause.

"Erlang, the concubine misses Tai'er a little, why don't you call him back for a few days?" Empress Changsun snuggled in Li Shimin's arms and said softly, she knew that she was afraid that she would not be able to keep Li Tai this time, the journey to Hangzhou was far away, and the prince would rarely have the opportunity to return to Beijing once he became a vassal.

"It's fine." Li Shimin said a little frustrated, "I'm afraid we won't be able to stay with Tai'er for long." ”

Seeing that Li Shimin had already seen it, Empress Eldest Sun couldn't use the words she had prepared before, and instead comforted: "Tai'er has grown up, and it's a good thing to have his own ambitions." ”

"Erxing's mother is worried, and Tai'er is only in her teens, how can she not worry?"

"If Tai'er was the kind of character he used to have, the concubine would definitely not want him to go to the fiefdom so early, but fortunately, he has matured a lot over the years, so he has less worries, but it will be difficult to see Tai'er in the future. However, as a parent, don't you want your children to make a difference? No matter how reluctant we are, we can only let him go on a run. "Empress Eldest Sun seems to be just saying her own thoughts, but why isn't this Li Shimin's idea? This is just a turn to persuade Li Shimin.

"Alas! is the king of a country, but he can't enjoy the joy of his children and grandchildren around his knees......" Li Shimin sighed.

"Every move of the royal family involves the lifeblood of the Tang Dynasty, others only know the noble side of the royal family, how can they know the helplessness of the people in the royal family!" Empress Changsun complained that men need majesty, and she always has to complain and act like a woman at the right time, and the lofty argument is better left to Li Shimin.

"The new arrival of Wazhou, whether there can be long-term peace and stability over there, it can be said that it all depends on the navigation technology. In the face of national affairs, the matter of children's love can only be put aside. ”

Maybe Li Shimin originally planned to let Wang Haoran go to Hangzhou, but Empress Changsun changed his tone in a few words, and I have to say that Empress Changsun is very smart.

A few days later, Li Tai received an order for him to return to Beijing, so he hurriedly found Wang Haoran to ask for advice, he was worried that once he returned to Chang'an, his father and mother would try their best to leave him in Chang'an, and this time his father suddenly asked him to return to Chang'an for no reason, which made him even more suspicious.

"Why don't you think better?" Wang Haoran handed Li Tai a holy decree asking him to return to Beijing to discuss the construction of a shipyard in Hangzhou.

"So, we'll be able to go to Hangzhou soon?" Li Tai has a little mixed tastes, he has been looking forward to going to Hangzhou with Wang Haoran and them, but now that it is about to be realized, he feels a little reluctant to his father and mother.

"It's not that fast, at least half a year later, you have to wait until the factories over there are all built, right?"