"You..." Qi Lian was anxious. When she heard that it was Si Beixuan's order, she didn't know what to say. Then she looked at these bottles and jars of things and became curious, "What kind of mess is this?"

?”

"What a mess, this is ink," Yu Yueli stirred a bottle of mixed ink and handed Qi Lian a pen, "You try it, it's quite fun."

Qi Lian rolled her eyes, anything was fun, but she still couldn't resist her curiosity. She dipped a brush in ink and wrote on a piece of paper, "What on earth do you want to do? Is there anything wrong with this?"

"Oh, don't worry." Yu Yueli put the paper aside and baked it on a candle holder, drying the ink. The writing suddenly disappeared. Qi Lian was stunned when she saw it. Yu Yueli put the paper in the basin again.

After a while, the handwriting appeared again. "It's fun."

"How is this done?" Qi Lian's eyes widened in surprise, "The ink mark does not melt when exposed to water, but can appear when exposed to water and dissipate when exposed to fire."

"It's a pity that this is a one-time use. You just can't bake it with fire a second time to make it invisible. You have to add something else." Yu Yueli replied, "Hey, you can help me try this again."

Another cup was handed over.

After all, Qi Lian is still a teenage girl, and she is also curious about these new and weird things. Once she gets interested, she forgets everything. She dips the brush into the paper and writes, and after it dries,

The writing disappeared again, "What is it this time?"

"Try putting it in the water." Yu Yueli also looked at it majestically, not knowing what it would be like this time. Seeing Qili put the paper into the water, the writing gradually appeared, and it actually floated up in the water.

The writings formed one after another and did not disappear. Qi Lian was dumbfounded when she saw them.

"Wow! This is amazing, how did you do this?" Qi Lian looked at Yu Yueli in surprise, hoping that Yu Yueli could help her answer her doubts, but Yu Yueli frowned, as if this was not her.

What the desired result looks like.

"It still doesn't work. Is there something missing?" Yu Yueli smelled the ink in the cup, wrote down a few materials on the side, then tried them one by one, and glanced at Qi Lian who looked surprised next to her.

"It's okay, just help me sharpen the ink."

This time Qili didn't feel any reluctance at all, and obediently went to the side to help grind the jade glass. She also wanted to know what kind of magical ink would come next.

The two of them had been working in the yard all day. When Si Beixuan came back in the evening, he saw that the two little girls were covered in ink and the house was in a mess. Their faces were black and the ink was everywhere. He took deep breaths and told himself

Don't be angry, but speak with anger

Drinking still revealed his current anger level, "You two made this palace a mess, what do you want?" Si Beixuan had tried his best to suppress his anger, but there was always something he couldn't help it.

At this time, it’s hard to sleep tonight if it’s like this.

Hearing Si Beixuan's angry shouting, Qi Lian was frightened. When Yu Yueli jumped over with an excited expression, she took Si Beixuan's hand and pulled him down to the test bench, "I succeeded, you see.

"Look," he said, and began to demonstrate to him. He dipped his brush into ink and randomly touched the paper.

I wrote two strokes. After waiting to dry, the ink quickly receded. When it was heated by the fire, it quickly appeared again, "This is the ink that appears when exposed to fire. This ink does not melt when exposed to water. It appears when exposed to fire. After cooling down,

The handwriting will be automatically invisible and can be used back and forth.

There is this kind of ink that does not melt when exposed to water and appears when exposed to water. It can also be used repeatedly. It will fade away after the water dries out and will appear again when it encounters water again. There is also this one, you will never expect this, this is

A true work of genius, after the ink is written,

Then use ordinary ink to write. After the ink dries, rinse it with a specific potion. The ink and ordinary ink will mix to form a new character, which is very powerful. However, no matter how powerful the ink is, if the paper is not strong enough, in the end

It’s of no use either.”

Si Beixuan looked at the three inks that Yu Yueli showed him and was a little surprised, "Have you made it?" It's only been a day.

"Yes, am I very powerful?" Yu Yueli said proudly, "Let's see if there is anything else you are not satisfied with, even if you say so, I will make it for you."

It only took one day to make it. He thought he could at least keep this girl calm for two more days. "Then what will you do in the next few days?"

"What are you going to do in the next few days?" Yu Yueli didn't understand what this meant. After thinking about it for a moment, she realized it instantly. Yes, she has been a little too busy recently, and the Red Cross is running smoothly.

Yes, Cui He at the medical center also got started very quickly. She hadn’t found something to kill time for a long time. Now she got all the things done. How will she relieve her boredom in the next few days? "Uh... I need to

No, do you think there is anything else I need to do?"

Si Bei

, let her figure it out by herself, "Didn't you just say that the paper is not strong enough? Why don't you try how to perfect the paper next? If you can make paper that does not burn when exposed to fire or breaks when exposed to water, it will be a great achievement.

It’s just one piece. But now, quickly clean up one piece, and you two can go wash it off too.”

Yu Yueli puffed up her cheeks, "Oh," she was covered in ink stains, but she was lucky. She wore a coat, and the ink stains were blocked. The clothes were not stained much, but there were two lines on her face and hands. Qi

Lian was a little more embarrassed. He cared about his image at first, but after he got too excited, he no longer cared about it. He was covered in ink stains, but this is more like what a child of this age should be, lively and comfortable.

She is more pleasing to the eye than the usual arrogant princess with a cold face.

Qi Lian also noticed that she was in a state of embarrassment. She was a little embarrassed to face Si Beixuan in such an image. She blushed and bowed, and quickly exited. Yu Yueli was also pushed into the bathroom by Yin Ling and took a bath.

Put on clean clothes.

It was time for dinner to finish cleaning up. Yu Yueli talked about her thoughts while eating dinner, "Actually, I still have the same idea. Using passwords is safer and simpler than these weird inks. You said that after being intercepted, the other party

If by chance or misfortune, the secret report is dropped into the water, then it will be revealed. This is what I think. If you want to use this ink, you can use the ink to write a password. Double insurance. What about the simplest password?
Chapter completed!