Yu Xiaotian nodded and agreed, and then Sun Yuanhua asked Yu Xiaotian a lot of questions about the geography of this world, and asked for a long time about this hand-drawn world map drawn by Yu Xiaotian, and Yu Xiaotian also gave him some answers as much as possible, so that Sun Yuanhua had a deeper understanding of the geography of this world.

After saying this, Sun Yuanhua seemed to be very interested in talking, and then pulled Yu Xiaotian to talk about some academic problems in geometric algebra, after all, Yu Xiaotian is also a bachelor's degree, although he has not graduated, but this knowledge is still quite rich, and Sun Yuanhua exchanged a little, which surprised Sun Yuanhua.

He didn't expect that Yu Xiaotian's knowledge in this area was so rich, and he hadn't even heard of many theorems, so he hurriedly recorded it and prepared to go back and study it in detail.

In the end, Sun Yuanhua took out the mechanical principles of the transcription that someone gave him some time ago, and asked who these things came from, and Yu Xiaotian of course told him that he had written them by someone.

Sun Yuanhua showed a shocked expression, he admired Xiaotian's knowledge to the extreme, and finally took out the set of mechanical principles that he had rearranged in two months and handed it to Yu Xiaotian to watch.

Yu Xiaotian only flipped through a few pages, and he could see that in the past few months, Sun Yuanhua had carefully sorted out these incomplete mechanical principles recorded by him, adding a lot of opinions about him and many shortcomings, although many of them were fallacious, but it could also be seen how much effort Sun Yuanhua had put into this set of materials.

So he immediately solemnly stated that he would use the fastest time to finish reading this set of things, and would revise some of these things again, many things, he could have a deeper discussion with Sun Yuanhua, Sun Yuanhua was very happy after listening to it, and then let Yu Xiaotian leave to rest.

When Yu Xiaotian walked out of Sun Yuanhua's residence, the sky was already white.

Yu Xiaotian only stayed in Tamsui City for a few days, then set off and left Tamsui, did not go to Kaohsiung to inspect again, and directly led the ship back to Fuzhou City.

This time, he went north to quell the rebellion, and after he came back, he naturally had to go to meet the new governor of Fujian first.

This trip he actually took a round trip, when he came back, he first passed through the mouth of the Minjiang River, at that time he considered whether to go to Fuzhou City first, but after thinking about it, he decided to go to Tamsui City first, and then talk about it after meeting Sun Yuanhua.

In the past few days, he basically stayed with Sun Yuanhua, discussing various academic issues every day, including geometry, algebra and mechanics, and dabbling in the most.

Even Yu Xiaotian, a future undergraduate student, was stopped by him on some questions, and he had to admit that Sun Yuanhua was indeed a very knowledgeable person, and this time he made so much effort to get him back, and it was not in vain.

But at the same time, Sun Yuanhua is also quite impressed by Yu Xiaotian's knowledge, especially about mechanical issues, he is very interested, Yu Xiaotian after getting the set of mechanical principles he has revised, read it in the fastest time, and some of Sun Yuanhua's fallacies have been modified.

After giving it to Sun Yuanhua again, the two had an in-depth discussion, Yu Xiaotian pointed out many of Sun Yuanhua's mistakes, Sun Yuanhua was a little unconvinced, so he argued with Yu Xiaotian, but in the end he had to admit that he was wrong.

In this regard, Sun Yuanhua treated Yu Xiaotian and could no longer afford any shelf, and said that literati were light, but Sun Yuanhua treated Yu Xiaotian better than him, but he still showed a strong desire for knowledge, completely put down the shelf, and kept pulling Yu Xiaotian to ask various questions, and later made Yu Xiaotian one head and two big, and had to flee from Tamsui City with his subordinates on the grounds of official business, which avoided Sun Yuanhua.

But Sun Yuanhua still asked Yu Xiaotian, as long as he took time, he had to hurry back to Tamsui City to see him, he still had too many questions, he had to discuss with Yu Xiaotian, too many questions, he had to consult Yu Xiaotian.

It wasn't until Yu Xiaotian nodded and agreed that Sun Yuanhua let Yu Xiaotian go, turned around and went back to the house, and plunged into the sea of learning again, and began to delve into the mechanical principles that Yu Xiaotian had revised again.

Sun Yuanhua is not a qualified official, but he has to admit that he is a qualified scholar, once he finds something he is interested in, he will devote himself to it, and he can completely forget to sleep and eat, which is why Yu Xiaotian respects him.

When Yu Xiaotian left Tamsui City, he specially instructed his subordinates to treat Sun Yuanhua well, provide him with all kinds of research and academic convenience as much as possible, and must arrange people to take care of Sun Yuanhua's body, and even arranged a full-time medical officer for him to take Sun Yuanhua's pulse every now and then, and pay attention to conditioning his body.

Nowadays, scholars like Sun Yuanhua in the Ming Dynasty are too few and too few, and it is not easy to meet one, Yu Xiaotian does not want him to die of exhaustion early, he hopes that in Sun Yuanhua's lifetime, he can write more books and make some useful academic works, and at the same time pass on to future generations, but also educate more students.

Sun Yuanhua even accepted Yu Xiaotian's commission and promised to take time to teach the geometry course of the Seawolf Army Academy and the Navy Academy, and set aside a few days a month to go to the Navy and Army Academy to teach geometry to those reserve officers.

Geometry in this era, but it involves the problem of artillery, the cannon is accurate and inaccurate, but it requires considerable geometric knowledge, in the past, the sea wolf was extremely lacking in talents in this area, and could only practice to teach the officers some practical and simple gunnery principles, and there were many problems in many aspects, but the arrival of Sun Yuanhua solved the problem of lack of teachers faced by Yu Xiaotian for a long time.

Although Sun Yuanhua is only a part-time job, he has made great achievements in geometry, and he can completely pass on a lot of knowledge about the principles of geometry to those reserve officers, and after learning some geometric principles, it will become much easier to learn artillery skills, which will solve the biggest problem faced by Yu Xiaotian.

So although he has been tortured by Sun Yuanhua in the past few days, he is still quite happy in his heart, and in this era, he is happier to find such a scholar with considerable knowledge than if he had won a fleet for nothing, so this operation to rescue Sun Yuanhua in the north, although the investment is very large, but it is too worthwhile!

In fact, the news of Yu Xiaotian's return to Fujian had reached the ears of Zou Weilian, the new governor of Fuzhou Yamen, as early as half a month ago.

However, when he heard that Yu Xiaotian's fleet had crossed the mouth of the Min River and returned to Weitou Bay in the south, he still didn't see Yu Xiaotian coming to Fuzhou to meet him, and he couldn't help but feel a little displeased.

Originally, Zou Weilian didn't have a good impression of Xiaotian, when Xiong Wencan was in charge of Fujian, he regarded Xiaotian as a confidant and maintained it everywhere, so that Yu Xiaotian did not say that he was rampant in Fujian over the years, but at least no one dared to provoke him, and Xiong Wencan's various requirements for Yu Xiaotian were also met as much as possible.

In the past, when Xiong Wencan was in Fujian, these people had no way to complain, so they could only sit and wait for the opportunity, and now Xiong Wencan was transferred to Liangguang to serve as the governor of Liangguang and preside over the military affairs of Liangguang.

Zou Weilian is an upright person among officials, but he belongs to the Donglin Party, and he used to work in the Nanjing Military Department, so he doesn't know much about the specific situation in Fujian.

After arriving here, although Xiong Wencan had talked to him about Xiaotian before he left office, he asked him to treat Yu Xiaotian well, so that he could use Yu Xiaotian well, and he must not go toe-for-tat with him, that would only be counterproductive.

But Zou Weilian is quite unimpressed with this, in Zou Weilian's eyes, no matter how good Yu Xiaotian is, he is just a martial artist, when will Daming let the military general ride on Wenchen's head and? These martial artists can't give them too much face, otherwise, they won't know what their last name is, and they will definitely kick their noses in the face.

So after Xiong Wencan left, Zou Weilian did not take more care of Xiaotian, the salary of the officers and soldiers under Yu Xiaotian's command in the past, even if Fujian's finances were tight, Xiong Wencan would try his best to find a way to solve it, even if it was delayed for a while, he would make it clear to Yu Xiaotian first.

But after Zou Weilian came, some people who were also Fujian generals began to pour bitter water on Zou Weilian, saying that everyone was a general of the same dynasty, but when Xiong Futai was there, he was biased towards Xiaotian everywhere, and the soldiers' food and salaries were all given to Yu Xiaotian first, and these soldiers and generals always owed wages for a long time and could not be solved.

In this regard, Zou Weilian also felt that since everyone is a soldier of the imperial court, then it is time for a bowl of water to be leveled, and everyone will share the benefits equally.

(Ask for a commuter pass, ask for a commuter pass!) ）