Hongwu Survival Guide

Chapter 75 Chang Xuan's Greetings

The topic of today's lesson is 'ocean currents'.

Sea navigation in the age of sail, the importance of ocean currents and sea winds is almost equal.

Just like Zhu Yuan’s recent summary, Yuan Ting transported grain by sea, and the early offshore routes were quickly abandoned. Apart from the fact that large ships were easily stranded due to tidal disturbances, another major factor was ocean currents.

In the coastal areas of northern China, there is a cold current from north to south throughout the year.

Therefore, the offshore route, from south to north, is equivalent to going against the current all the way, and the difficulty of transportation can be imagined.

Let alone ocean routes.

According to Zhu Yuan's estimation, the farthest of the two "ocean routes" used by the Yuan court to transport grain did not exceed [-] miles from the coastline, and they did not even go beyond the scope of the offshore continental shelf.

However, compared to offshore routes, after February every year, ocean currents from south to north and west to north begin to appear on the open ocean, which is what he has heard more than once from various classics and related people. Open the sea in February'.

After the emergence of this ocean current, even if the wind direction is unfavorable, just relying on the direction of the sea water, it happens to be able to gradually send the fleet to the Shandong Peninsula or the mouth of the Bohai Sea further north.

What Zhu Yuan wants to talk about is mainly the causes of ocean currents.

Such as wind power.

Like density.

In addition, he also talked about the nearby Zhoushan Fishing Ground, which is also closely related to ocean currents.

These are actually the basic geography knowledge in the middle and high school stages of the previous life.

Zhu Yuan's goal is to let everyone know why while knowing what is happening.

The more truths you understand, the less you are afraid of the ocean when you break the unknown.If you no longer fear the unknown, you will be able to open up the ocean more smoothly.

The class time is still half an hour.

In the end, Zhu Yuan admitted frankly that what he said was not necessarily correct, and that everyone would need to spend more time in the future to verify and summarize, and even put forward a new theory.

However, Zhu Yuan also emphasized that many phenomena related to the ocean, whether it is tides or ocean currents, have clearly explained causes. When you encounter them, you don’t need to panic and doubt, just explore and discover.

At the end of the course, Zhu Yuan once again made a request to Liu Lian, asking him to organize a team to summarize the corresponding past data and observe the current ocean currents around the current grain transportation affairs, and make clear documents for everyone's reference.

Unlike tides that can be calculated, ocean currents are involved, and long-term observations of several years or even decades are required to conclude more clear laws.

At present, it is still mainly based on various classics collected by Yinghai Division during this period and oral information from a large number of shipping personnel, and it is closely related to shipping.

Finally announced the end of the course, still no 'goodbye teacher'.

rude!
Everyone dispersed, and Hua Gao and Wu Zhen came to the hall together. It was the first time Wu Zhen saw the globe brought by Zhu Yuan as a teaching aid, and he even fiddled with it with a little inexplicable fear in the novelty.

Own……

Live on a ball!
What should I do if I fall? !

Zhu Yuan didn't bother Wu Zhen, he was talking with Hua Gao, and saw Tongzhi Changduan, commander of the Mingzhou Guard, coming forward with a young man who looked somewhat similar to him.

These days, Chang Duan has been very cooperative with Zhu Yuan's various arrangements.However, Zhu Yuan could feel that this third-rank military officer seemed to be deliberately keeping a distance from him.

Everyone has their own ideas, as long as you don't miss the business, and you are not gold, you don't need to be liked by everyone.

today……

Looking at the young man again, it was a surprise.

Chang Duan stepped forward, greeted everyone with clasped fists, then pulled the young man beside him and introduced him, "My lords, this is Chang Xuan, the dog. I take the liberty to come to listen to the Hanlin lecture today."

Young people in their 20s wearing long gowns and black gauze bowed respectfully to Huagao, Wu Zhen and Zhu Yuan respectively.

Hua Gao and Wu Zhen accepted it calmly.

Zhu Yuan still did not resist.

After all, he is a Changjuan Shangguan, and in this day and age, his official position far outweighs his age, not to mention, he is still a generation older than Changxuan, so it is only natural that he is bowed down by the younger generation.

When Chang Xuan got up, Hua Gao spoke first, patted the young man on the shoulder, and said with a smile: "You are a young scholar, good at studying, don't fight like me and your father."

Chang Xuan cupped his hands again: "I would like to listen to the instruction of the governor."

Then he turned slightly to Wu Zhen.

The deputy governor didn't teach, and the deputy governor turned to the globe again, and the deputy governor was still worried about whether he would fall off!

So he looked at Zhu Yuan.

Zhu Yuan also smiled and said, "I'm not in good health, so I don't have much energy to answer your questions. If you have any questions, you can always go to Langzhong Liu. In the future, the court will pay more and more attention to these new learnings. You know more Some, only good."

During the conversation, Zhu Yuan also roughly judged that Chang Xuan should still be white.

It doesn't mean to solicit.

Often making his son come to see him on his own initiative is already a kind of closer gesture, there is no need to overdo it.

Chang Xuan respectfully agreed again.

Chang Duan next to him also breathed a sigh of relief.

These days, Chang Duan quietly took the knowledge such as "Mathematics Foundation" home and let his son study it, because he also felt the importance of these knowledge.

However, Chang Duan is a general, but like Hua Gao, he does not lack the political acumen that he should have.

On the one hand, the young man in front of him has risen too fast, his foundation is not stable, and he has been favored too much by the world. The so-called blooming of flowers, burning oil with fire, climbing too high in a short period of time, he thinks it is not a good thing.

On the other hand, he also knew the things about Jinling, and realized that there might be discord between the young man and the left minister.He doesn't want to get involved.Therefore, when the news came that Zhu Yuan became his immediate superior, he immediately dismissed the idea of ​​letting his son be nominated by the left minister to be an official, lest Chang's be caught in the middle and make life difficult.

Just recently, one thing has become more and more clear.

There will be an imperial examination this autumn.

It would be a better way for his son to pass the imperial examination to become an official.

Today, I quietly brought my son, who has many doubts in his heart, to attend class. Chang Duan originally wanted to be vague.

However, it was also Zhu Yuan's previous treatment of Liu Laoqi's family that allowed Chang Duan to see the meticulousness of this little Hanlin. It happened that Hua Gao and Wu Zhen were both there, so he felt that it would be okay to let his son show his face.

Zhu Yuan's reaction reassured Chang Duan even more.

This little Shangguan himself should be able to see that his son has no official or job, but he didn't open his mouth to solicit when he was currently employing people.Not only that, but he also mentioned the importance of these new knowledge, and took the initiative to open the door of convenience, so that Chang Yu could ask Liu Lian if he had any doubts about knowledge, which obviously understood his mind and prevented him from getting into trouble.

For such a person, Chang Duan felt that if it was a few years later and he could still not fall down, maybe it would be okay for the Chang family to get closer to each other.

(End of this chapter)