For the sake of safety, Daming's ports and city gates have a rule that they are not allowed to enter after a time limit. The only thing in the world that can compromise this rule is the imperial decree of Emperor Hongwu, and the rest are not counted even the decrees of the queen and prince.

So of course, when the emissary's fleet was gradually approaching Liujia Port because of galloping all the way, they were already prepared to be unable to enter the port and had to watch the port drifting on the sea from afar.

But they never expected that the treatment they received would be like this——

The three beams of yellow light, which were particularly bright in the dark night, hit their boat from afar, like a magic needle for fixing the sea, and the three beams of light fixed them in place.

After drifting at sea for five days, the Daming mission team hurriedly tried to dock at the port because they were worried about intrusion by thieves. Bathed in the dazzling light like daylight, they felt a subtle sense of guilt for no reason.

wait!We obviously didn't do anything bad, why should we feel guilty?

I don't know, anyway, it's the situation of being stared at by everyone, and there is a feeling that they have done something wrong. In other words, why are they still found after being so far away?

There is no comparison object at sea, so it is extremely difficult and professional to distinguish the distance at sea. Jian Rong obviously does not have this skill. He reached out to recruit an old sailor on board and asked: "Liu Guandai , can you see how far we are from the shore now?"

Liu Guandai took out a square ruler, and after some measurements and records, he told him a number that surprised him, "How far is it?"

"The daylight is a bit dim now, and there may be some errors. The subordinates are only seven or eight percent sure." Liu Guandai said respectfully.

"That's enough." Jian Rong touched his chin, glanced at the Japanese envoy who was whispering, leaned into Liu Guandai's ear and asked quietly: "Based on your experience, if you use a Japanese manpower boat from here How long will it take to row to our port?"

"Stop talking for an hour or two," Liu Guandai immediately understood what Shangfeng wanted to say, and said in a low voice, "It's just that if they move forward at that speed, after they landed , I’m afraid I don’t have the energy to do anything else.”

Jian Rong narrowed her eyes slightly, and asked again, "Am I a sailboat like ours?"

"With the big sails of a treasure ship, it takes about an hour. If the wind is favorable and the wind is stronger, it can take half an hour or even faster."

Half an hour...Jian Rong lowered her eyes, lost in thought.Although he is not good at naval warfare, he still knows the basic concepts and logic of marching and fighting.

Today, there are only two types of mainstream ships on the sea, either sailing boats that borrow the power of the wind, or small wooden boats that use manpower. From this point of view, this searchlight can block the net at the same time, and the huge sailing boats borrow the power of the wind, and their forward speed is fast and the manpower consumption is low. , but can't hide from the searchlights, and will be found far away.The smaller and more flexible boats are all driven by manpower. Once they are found, they must either retreat or advance at full speed. No matter which choice they make, physical exertion is inevitable.

No matter what kind it is, the searchlight built in the port can force it to make a choice in the shortest time, and give the defense force enough time to react, whether it is to fight or lock the city, it can effectively defend against Japanese pirates.

Although it cannot force back the enemy, nor can it prevent night attacks, it can make the attacking party feel very uncomfortable, which is enough as a fortification.

Is it just that it stares at people like this after it finds the enemy?This fuel consumption... shouldn't be low, right?

In fact, Jian Rong misunderstood one thing.

The reason why they put three high beams on them was not that Daming wanted to show off his wealth, but... ahem, it was actually because the port area really couldn't see them clearly.

From Jian Rong's point of view, I can clearly see three beams of light locking on me, so I think they must have been seen. Posture, in their hearts, their every move must be in the eyes of their colleagues.

But this is actually an illusion created by them looking at the bright place in the dark. In fact, the people upstairs in Liujiagang City can only barely see something unusual on the sea, and they are not sure what it is here.

The principle of the searchlight is to use threaded glass to achieve the effect of several convex lenses. The light will converge on one point after passing through different convex surfaces. This point is the brightest position, but then the light will continue to spread along a straight line. If it is turned on, although the subsequent positions also have brightness, the light will be significantly weakened.

Jian Rong's fleet is precisely in the light attenuation zone, even with three searchlights superimposed, that position is still out of everyone's sight.

Therefore, the people in Liujiawan lit three lights to see if they could illuminate clearly, but judging from the current effect, the brightness of the three searchlights can only be regarded as barely.

Especially the people in the port area still look at the dark from the light, and the weakening effect is more obvious. "Just relying on the lights in the port area is still not enough." Mu Bai squeezed the telescope in the palm of his hand, not very satisfied with the current situation, he whispered: "If you can't increase the brightness, you have to find a way Insert a lighthouse in the sea, otherwise the defensive effect will be too limited."

Now the light source fuel of the lighthouse has been replaced with kerosene. In order to improve the combustion rate, both the wick and the lampshade have undergone several upgrades, and they have reached a bottleneck.

There is no way to change the light source, so you can only change the placement direction.

But even in the era of thousands of years later, it is not easy to build a lighthouse on the sea, let alone in the Ming Dynasty where most of the building materials cannot withstand the erosion of hurricanes and sea water.

Whether it is meaningful and valuable to spend a lot of manpower, material resources and even human life to build a lighthouse is a question.

Judging from the current situation, it is obvious that there is not much benefit. Of course, if the sea ban can be lifted in the future, with the supplement of sea trade and taxation, it will be another matter.

Mu Bai turned the binoculars in his hand wildly, and the commander in chief who was following behind him was so heartbroken.

The little Huangsun held a clairvoyant that hadn't been equipped yet. He heard a fellow villager who was on duty in the palace say that he could see thousands of miles with this thing on.

Before that, he just took it as an anecdote, but just now he saw it with his own eyes!

Just when everyone squinted their eyes in the direction where the searchlights gathered and expressed that they didn't know what it was, the little grandson who used this instrument showed a firm attitude, and after that he ordered everyone not to be nervous, to maintain normal vigilance Can,

There is no doubt that the little Huangsun must have seen what the black spot in the distance was, so they let their guard down.

As the commander-in-chief stationed at the most important seaport in Ming Dynasty, he played night raids with Emperor Hongwu and served as a watchman. Even if the eyesight is not up to clairvoyance, it is not impossible to have fifty miles.

If he didn't even see clearly, the opponent's position can be imagined, but the little Huangsun can see it with a tool. Do you need to ask what the tool is? !

I really want to, I really want to try it!

With the addition of the telescope, Mu Bai could indeed vaguely see that it was an official ship of the Ming Dynasty, but now that the sun and the moon are changing, the light is limited, and even with the naked eye, it is very blurry even with a telescope. The identity of the other party is mainly recognized by the colorful flags hoisted on the ship.

This also made Mu Bai firm in his determination to let the ship hang the flag in the future, preferably on the top of the ship. Now the flag planted on the side of the ship is too inconspicuous from the front view.

As for the scorching sight from the side and the commander in chief who looked over frequently... Uh, it's not that he didn't notice, but the telescope is a controlled product now, this thing is a double-edged sword, and the production method is not difficult, so Emperor Hongwu ordered A password was issued, and every telescope was registered.

According to regulations, non-restricted people cannot use it, just to prevent its existence from being leaked out.

Except for a few members of old Zhu's family who have binoculars, only Xu Da, whom Zhu Yuanzhang trusts very much and who is responsible for guarding the border, is not even matched by Mubai's "adopted father" Fu Youde.

For this reason, his "adopted father" has gone to the palace many times. A few days ago, he even revealed that for a telescope and the follow-up good things from his "adopted son", he can agree to Hong Wudi's teasing and accept Hong Wudi's The meaning of a foster father.

This move was stopped by his son, Mu Xiaobai's elder brother Fu Zhong holding his thigh.

During the family banquet of the Dragon Boat Festival, Emperor Hongwu rewarded the generals who conquered Yunnan in one go. For rising generals such as Fu Youde and Lan Yu who have not yet reached the highest point, Emperor Hongwu rewarded them very much. simply.

He betrothed Lan Yu's only daughter to Zhu Chun, the eleventh son of the emperor who is only 12 years old now, and betrothed his ninth daughter, Princess Shouchun, to Fu Zhong.

Of course, since the princes and princesses are still young, this is just an engagement.

The wedding ceremonies for the children of the royal family are complicated, and it will take at least four or five years after all the processes are completed, when the little prince and princess will all reach the marriageable age.

With great difficulty, Fu Zhong got full favorability with Princess Shouchun under the matchmaking of his reliable younger brother Mu Xiaobai, and the beauty nodded. The relationship between her and her husband has suddenly become a generation worse, and ninety-nine out of ten marriages will fail, how can this be done.

So, in order to prevent his son from being a bachelor, poor old father Fu gave up his original plan with tears in his eyes.

Not to mention, the look of the tall and burly man looking at the sunset and sighing in disappointment looks really pitiful. He was moved by that lonely look, and Mu Xiaobai, who couldn't bear it, was so excited that he took the time of the Dragon Boat Festival last time. The used glass was given to Father Fu.

Of course, what he gave away was not the semi-finished product made of sand last time, but the finished version after redrawing and coloring with the workshop's special adhesive paper pigment.

Colloidal paint can stick to the glass after drying, as long as you don't pick it hard, the fixing effect is not bad.

But as the saying goes, you can’t have both, the light transmission of this kind of colloidal paint is not very good, if you want to project and watch it like last time, basically black and white shadows will appear, with only a little bit of color.

Fortunately, a nimble young man in the workshop had an idea and put it in a black box.

Although colloidal pigments have poor light transmission, the colors are very bright and lifelike under the condition of light. In addition, most of the perspective paintings you used before Mubai are seen through a small hole equipped with a magnifying glass. People have a feeling of being in it.

In this way, as long as someone helps replace the glass sheet, you can see the scene that Mubai covered up before without complicated projectors and light curtains. What's even more amazing is that after changing the direction of the light source, this can be achieved even with ordinary drawing paper. Effect.

This broke Fu Youde's novelty, and he found out the best use of these glass films without a teacher - as long as the extraction speed is fast enough, these pictures can be moved.

However, it is obvious that glass film cannot withstand such rough treatment. Fu Youde simply asked someone to make a copy, and drew all the patterns on the glass onto paper. Although the effect is not as clear as glass, it is easy to operate. Much more convenient.

When you have something good, you naturally have to share it with your good friends. After the instrument satisfies him, Fu Youde immediately holds a banquet, invites the old guys to play at home, and shows off the equipment given to him by his "adopted son". nice one.

This show off is not just a hornet's nest. From the next day, all kinds of letters have been stuffed on the desks of Mu Bai and Zhu Biao. As His Royal Highness, who is very popular and has relatives all over the world, Zhu Biao received Letters and invitations to meet are like snowflakes.

At first, the old father felt baffled, but after he knew what his son had done, he immediately pushed the little boy out of the house without hesitation, saying that the child had grown up, and he didn't care about this matter. .

Mu Bai was simply stunned.

Mu Xiaobai, who was in front of everyone's eyes like wolves and tigers, really had a black question mark face: "...??"

That’s all, after all, Mu Bai is a child, or the grandson of the emperor. Although these people want this Huang Mubai painting machine (Mu Bai: Wait, don’t name it randomly! I don’t agree!), they can only respect it. Respectfully queue up and wait for the construction period.

But his little uncles are different. They are already far away from Fan's little uncles, and they haven't heard the news yet. The palace can't wait for these things.

The little prince and the little princess went up hand in hand, spitting and rolling with a runny nose and an aggrieved face, the grandfather who didn't get the gift first had a dark face all day long, and the old man who had so many things inexplicably was always full of hints and looked at him .

Every time Mu Bai returns to the palace today, he is like a middle-aged man living in the gap between family and work in modern times, full of powerlessness and tremendous pressure.

Today, he can only get a little peace of mind in the carriage. In short, he is exhausted physically and mentally.

So he took his little friend Mu Chun, who had just returned from Yunnan, to Liujiawan under the pretext of supervising the construction of the lighthouse.

But what he never expected was why there were eager eyes here! !

Even if the chief soldier around him kept staring at him and drooling, Mu Bai couldn't show him anything, so he could only keep silent, turned his eyes away a little guilty, and continued to direct the soldiers below to adjust the searchlights.

Can't give, absolutely can't give, if you give it, there will be no peace, you must hold on, Mu Xiaobai!

The author has something to say: Xiaobai: For a happy life, you must not be soft-hearted!

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