Wang Xiaoming of Lucifer

Seeing them coming, Lucifer put away the account book he was looking at, got up and hugged Wang Xiaoming onto the soft couch, and then sat beside him.

The soft couch in Ming Yushan's study room is not big, and the big ones like Lucifer and Wang Xiaoming can barely sit on one side, while the two adults, Gu Yunqing and Alice, are on the other side, which seems a bit crowded.So in order to make Alice sit more comfortably, Gu Yunqing took the initiative to hold her in his arms—although Gu Yunqing has been wandering in the fantasy world, he has bumped into many protagonists who travel through the fantasy world in the modern world. Personally, compared to ordinary ancients, Gu Yunqing is still a little more open, and will not shy away from getting close to the unmarried Alice in front of outsiders.

"Before the experiment, let's copy the letter first." Wang Xiaoming took out the letter paper from his arms, looked at Lucifer and said, "After all, it is rice paper, so it is easy to break."

"It doesn't need to be so troublesome." Lucifer directly took out a handheld printing and copying all-in-one machine from his own space, and scanned the letter paper directly with the scanning head, and the connected printer printed out the scanned things— — and made three copies.

Gu Yunqing picked up one of the copies with great interest, and compared it back and forth with the original.

"This thing is good." Gu Yunqing sighed after putting the two things back on the low table of the soft couch.

Scanning paper with red light or purple light is a very simple matter - of course this is based on the fact that there are red light and purple light in Lucifer's space.

But since Wang Xiaoming agreed to teach Gu Yunqing, of course it was impossible to get started directly.So Wang Xiaoming asked Lucifer for a note by the way, and showed Gu Yunqing the function of the purple light lamp.

"Anyway, some special inks cannot be seen under sunlight, but they can be displayed under different lights." As he spoke, Wang Xiaoming scanned all the letter papers with a red light, and replaced them with The purple light scanned it again, but still couldn't find it.

"As expected." Wang Xiaoming shrugged, "After all, most of the ancient invisible inks were made of natural materials." After speaking, Wang Xiaoming turned to look at Lucifer, "An apple, a lemon, a glass of water, and Litmus reagent."

Lucifer quickly took out what Wang Xiaoming wanted.

"You really have everything in your space." Looking at the four things on the table, Wang Xiaoming couldn't help asking, "Why do you have litmus reagent?"

"Handy." In fact, Lucifer himself doesn't even remember how this thing entered his own space - the consequences of being too lazy to sort out his memory.

"Everyday envy and jealousy." After Wang Xiaoming sighed casually, he turned to introduce Gu Yunqing, "You must know these two." Wang Xiaoming pointed to the water and apple, "This is a lemon, and this is a litmus." Wang Xiaoming Pointing to the remaining two things, "In our world, there is something called acidity and alkalinity, which is used to divide most things into three categories, acidic, alkaline, and neutral."

"Which three words?" Gu Yunqing asked.

"Sour, sweet, bitter, spicy, sour, alkaline, alkaline, medium in the middle." Wang Xiaoming replied.

Gu Yunqing nodded.

"And litmus, when it meets acidic things, it turns red, when it meets alkaline things it turns blue, and when it meets neutral things it doesn't change color." Wang Xiaoming said while tidying up all the papers on the table Fold and put away.

After confirming that he would not stain the paper, Wang Xiaoming conjured a fruit knife with his soul power, cut the lemon and apple in half, and then dripped litmus reagent on the three things respectively.The litmus reagent on the apples and lemons changed color as Wang Xiaoming said.

"So, if Yuan Xingyu used the acidic or alkaline colorless aqueous solution to write, you can see it when you put litmus on it." At this point, Wang Xiaoming added, "Of course, it can also be used to burn it to black." Measure this out."

After speaking, Wang Xiaoming asked Lucifer for a potato and a bottle of iodine.

"However, there is one exception, that is, if he uses a neutral colorless aqueous solution, there is no way, but we can try our luck with iodine to see if he wrote it with a starch solution." The iodine dripped on the same cut potatoes, and the surface of the potatoes turned blue in an instant.

Gu Yunqing nodded: "My sister-in-law seems to be very knowledgeable."

Wang Xiaoming smiled embarrassingly, wondering if he should explain to Gu Yunqing, this is the knowledge they had to learn in junior high school at that time: "That, so let's try it!"

After speaking, Wang Xiaoming took out the last piece of letter paper from the entire letter. The reason why he chose this piece of paper was because this piece of letter paper had the most empty space.

A lot of empty space means that this is the most likely place to write hidden information.At the same time, because there are many blank spaces, Wang Xiaoming and the others don't have to worry about the color of litmus and iodine covering the words on the original letter paper.

However, the results of the experiment were disappointing. What color should the litmus and iodine be or what color, there is no sign of changing color at all.

"Oh." Wang Xiaoming sighed a little unhappy, you know, he thinks this is the most likely guess.

Lucifer silently patted Wang Xiaoming's head as comfort.

"Forget it! Let's try stacking paper!" The comforted Wang Xiaoming came back to life, took out a copy, cut it into a square, and folded it up. "This is also a very common paper. encryption method."

After folding the thousand paper cranes, Wang Xiaoming took the pencil that Lucifer handed him, and wrote a big character 'Ming' on the paper.

After finishing writing, Wang Xiaoming took apart the paper crane and handed the paper to Gu Yunqing: "Look, in this way, you won't know what I wrote at the beginning."

"This is indeed a good way." Gu Yunqing nodded, "But there are only simple folds on the letter paper, and there are no other creases."

"Hmm. Generally speaking, it is easier to be cracked if you use the creased paper directly, so most of them write a copy on the creased paper first, and then write it on the non-creased paper. Make a copy." Of course Wang Xiaoming knew this, so he continued to explain, "What we need to look for at this time is whether there is something unnatural in these words, such as an extra point, or an unnecessary twist. Or those The spaces between characters are particularly large or small."

"It seems that you can give it a try." Gu Yunqing felt that what Wang Xiaoming said was quite reasonable.

So the four of them divided up the dozen or so letters and checked them individually.