Usually the two of them wash together, but they can't delay for half a day.

Today, with a new love, Feng Jing can be regarded as taking a combat bath.

Don't rub your back.

Don't press Su Wu on the shoulder.

Hmph, she's not missing.

After Su Wan washed up, after changing into a black practice uniform, Feng Jing was behind, and the two rode horses to the gate of the border city.

But it was not the gate where Su Wu entered the city, but the gate that led to Beixia.

Seeing Feng Jing's arrival, the soldiers were all respectful.

The news that the princess had come to the border city had already spread all over the border city, so when they saw Su Wu dressed as a man, the soldiers had already guessed her identity.

He was also very polite to her.

Su Wan followed Feng Jing, who was excited like a child, and climbed the city wall, "Look at your happiness." ”

"Of course I'm happy, I don't know how far this thing can see." I was in the yard, and I could only see the wall of my house as far as I could go, and I couldn't see anything in the sky when I looked at the sky.

Modern telescopes, how to find them, can see farther than Ye Siyin tossed in ancient times, right?

Su Wan just thought so in her heart, she didn't know much about the principle of telescope multiples as a scumbag.

However, there are many telescopes of different magnifications in her space, as well as astronomical telescopes, and no telescope should be as farther than an astronomical telescope.

Ahem, if it's wrong, no one will see it and scold her anyway, hehe.

It's just that the one given to Feng Jing now is more retro, if you really take a military telescope out, isn't it a confirmation of Ye Siyin's guess that she has space?

She can't hand over this kind of hole card right now.

This kind of simple telescope is a traverser who probably understands a little, although she may not necessarily do it, but Su Wan can also excuse herself by saying that she happens to be able to make a telescope, and Ye Siyin has made the glass, so she made the telescope with Ye Siyin's glass.

This statement also makes sense.

"Huh." Su Wan looked out of the city wall.

"What's wrong?" Feng Jing looked sideways at Su Wan, so he didn't see anything outside the city wall.

"I saw the reflection just now, someone must be secretly looking at our side, I point in one direction, you look that way." Su Wan quietly stretched out her hand and pointed to a direction and angle, Feng Jing immediately understood, and after pulling out the telescope, she immediately put it in front of her eyes and looked over there.

"I saw that the man had something in his hand that was the same as the pipe in my hand." Feng Jing didn't dare to look at it for a long time, and put the telescope down.

He didn't look at it for a long time, and Su Wu asked worriedly, "Did they find you?" ”

"No, they just put down the copper pipe in their hands and are talking." Feng Jing doesn't plan to expose the fact that he also has this thing for the time being, "Will they see that there is a reflection on my side?" ”

The telescope that Su Wan gave to Feng Jing seems to be reflective, not a military honeycomb lens with anti-reflective settings.

It's in the space, but it's not going to take it out yet.

"When you use it in the future, avoid using it directly under the light source, and hide in the shade, which should not reflect the light. If there is light irradiation, it will be reflected, and if there is no light, what light will be reflected? ”

Ye Siyin probably didn't want to be found out that she was using a telescope, in a place like Mobei, there was not even a single tree outside the city wall, and those people had to hold a telescope to observe the situation in the city from time to time, and it was not easy to find a shady place to hide.

Feng Jing has a strong learning ability, and he also feels that Su Wan's words have some truth, so he walked to the lookout room on the city wall, retreated left and right, found a good angle, and then continued to take out the telescope to use.

"I can see so far." Feng Jing estimated in his heart, he could still see so clearly from such a distance, and he could see the faces of those people clearly, this thing was really amazing.

"This is designed by Ye Siyin?" He put down the telescope again, his heart was full of uneasiness, "She used to make a lot of things, such a copper pipe, can see so far, it is really in line with the name of clairvoyance, used in the military, can make people invincible, I don't know, she will make anything else." ”

"She didn't invent it." As a modern person, Su Wan is very confident in denying, she used to be most unaccustomed to some copyists and inventors in the crossing to say that other people's credit is their own, but some situations can be understood, such as the situation that can't eat.

If it's just for pretending, it's really unnecessary.

How good it is to be like her, no culture is no culture, otherwise she took out 300 Tang poems and Song Ci books from the space, and she could casually create a great writer's character.

"How does the lady know?"

"Do you remember someone? It's that we want to build a house in the village, and I went to find a person who designed a house, and he told me that someone was looking for him and wanted to snatch things from him, so I felt ......" Speaking of this, Su Wan looked at Feng Jing with some uncontrollable expression, hoping that smart people could have their own brains.

Although it is a relatively long time ago, Feng Jing still has some impressions, "I remembered that when I investigated Ye Siyin's rebellion, I found that she secretly summoned many skilled craftsmen, including the one you were looking for, and she hid in the countryside in order to avoid her, but I didn't expect that she still couldn't escape her persecution." ”

"I understand, Ye Siyin's ingenuity should be snatched from the hands of those craftsmen."

Telescopes are not, but other things, it is not clear.

"Qianqin has never paid attention to these strange and ingenious skills, it seems that in the future, I still have to tell the imperial brother that I will have more funds and attention to the construction of the Ministry of Industry."

No, countries that pay attention to scientific research and development have a future, and if they do not develop new technologies, they will be crushed by the science and technology of other countries sooner or later.

Although the development of science and technology does not necessarily bring benefits, technology itself is not bad, but some people use it to do bad things.

It's like Ye Siyin used modern knowledge to do bad things in ancient times, knowing how to cure smallpox, and deliberately spreading it, just to make herself a savior.

These traversers are intruders themselves, and living their own small lives in a corner of peace is already a contribution, and those who use the knowledge of the future generations to benefit the people are more worthy of respect, but don't do bad things.

Su Wu suspected that she had crossed over here, I was afraid that God didn't bring her over in order to suppress Ye Siyin, right?

"Lady, what are you thinking?" Feng Jing thought that Su Wu was frightened, so he held her in his arms and comforted, "Don't worry, no matter what Ye Siyin can come up with, I will protect the border city." ”

Ye Siyin can make more things, the fireworks are already here, and it is even easier for her to transform them into more powerful weapons.

Su Wu hugged his tall and powerful waist, "I'll accompany you." ”