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Yu Feibai's words touched Professor Liu, or he had to express his joy in his heart when he got a good thing. This is the norm and it is understandable that no one can avoid it.

Professor Liu was no exception. Under Yu Feibai's instigation, he took the box first and then smiled happily: "Actually, I didn't lie, it's indeed a resin. But it's not an ordinary resin, but a kind of rubber called a fluorescent tree."

"Fluorescent Tree?"

Wang Guan and others were stunned, and Yu Feibai shook his head and said, "I have never heard of it."

"It's normal that I haven't heard of it, because this plant has disappeared."

Professor Liu smiled and said, "It disappeared as early as the middle of the Tang Dynasty. Now only some unpopular ancient books have recorded this plant. Of course, fluorescent trees are my name according to their function, but they are other names in ancient books."

While speaking, Professor Liu mentioned several ancient names in succession, and Wang Guan and Yu Feibai still shook their heads repeatedly, ashamed of their ignorance.

"This is normal. They are all relatively non-disciplined books. They are not specialized in research, and few people pay attention to it." Professor Liu comforted him in turn: "Don't talk about this kind of plant, even some major experts may not know it. It is normal for them to have specialized in their professions."

While nodding, Yu Feibai continued to ask for advice: "What is the effect of such plant rubber?"

"This plant likes to grow in places rich in phosphorus soil. Although it is a tree, the plant is only one foot tall. Because its roots are very developed and can absorb a large amount of phosphorus powder, at night, under the reflection of moonlight, the branches and leaves of the plant can fluoresce."

Since it was said, Professor Liu no longer concealed: "It is not only the branches and leaves. After mashing the branches and leaves and extracting the resin, it also has this function, which can emit faint fluorescence at night."

After prompting the mystery of the material in the box, Professor Liu couldn't help but hold the box tightly, not because he was worried that Wang Guan and others would regret it, but because he was just a kind of ability. In addition, he felt that at this time, they should have been dumbfounded and amazed. However, Professor Liu looked at it and found that these people had a very cold reaction. There was no emotional ups and downs.

For a moment, Professor Liu felt unbalanced and said strangely: "This is a very rare thing, or do you don't believe what I said?"

"Believe it, why don't you believe it?"

Yu Feibai shrugged his shoulders and said casually: "Although things are rare, to put it bluntly, they are just variants of Night Pearl. Such things may have been priceless in ancient times, but they are not very valuable now."

"That's because you don't know the true value of this thing."

At the right time, Professor Liu was a little angry. After all, he regarded it as something treasured, but others regarded it as a cabbage on the street. Of course, it made people feel unhappy. In an impulse, Professor Liu directly told the real secret of the thing: "According to ancient books, some people melted this kind of glue into ink and then drew pictures to copy the book. The works can also shine at night..."

"What."

In an instant, Wang Guan and others were naturally shocked and somewhat suspicious.

"Really or false?" Yu Feibai said skeptically: "It seems that I have never heard of such calligraphy and painting works."

"Didn't I say that this plant was very rare in ancient times. It disappeared in the middle of the Tang Dynasty." Professor Liu defended: "Think about it, there are not many paintings in Tang Dynasty that have been passed down to this day, let alone calligraphy and painting that use this kind of rubber is even rarer and hard to find."

"Your words sound reasonable."

Yu Feibai nodded and shook his head again and said, "But I still don't believe it unless... Professor Liu, it's not that I'm suspicious. Maybe there was such a thing in ancient times. You can really be sure that the rubber in this box is what you call fluorescent resin? So I think you'd better do a verification so as not to be happy."

"Agree in advance, if it weren't for fluorescent resin, we would not be responsible." Yu Feibai's last sentence was a sharp hit, which naturally made Professor Liu a little shaken.

"The thing is here anyway."

At this time, Wang Guan added fuel to the fire: "Is it true or false? Just intercept a little and do an experiment. Of course, if Professor Liu thinks it is true and is willing to take it seriously, then we have never said anything."

"That's that's..."

Yu Feibai cooperated with the tacit understanding and smiled differently, as if he was laughing at Professor Liu for preparing to deceive himself.

In this case, how could Professor Liu be calm? He stood up immediately without saying a word, and then reached out to invite him, "Everyone, please go to my study to be a witness."

Wang Guan and others would definitely not refuse, and happily followed Professor Liu to his study.

When we walked into the room, we found that it was not so much a study room as it was Professor Liu's study room. In the space as spacious as a living room, not only is it a study room such as desks and bookshelf, but there are also two or three rows of shelves. The shelves are full of various antique objects, and the Boshan stove bought from Mr. Jin's house is also included.

From this point of view, Professor Liu's collections are quite rich, and there are also some small fine products.

Seeing that the hunt was happy, Wang Guan naturally looked at it. Although he did not touch and appreciate it, he could roughly determine which things were genuine and which things might be imitations, and of course there were also fakes at a glance.

However, as a guest, even if you find a fake, Wang Guan has no intention of correcting it. After all, in the antique industry, it is most taboo to have a simple and profound conversation. If you don’t have enough friendship, you may not believe it, and you may think you want to spoil him.

Why do experts always use tactful language to express fakes when speaking? The reason is that it is sad to buy fakes. If you don’t pay attention to your tone, people will definitely think that you are gloating and sprinkling salt on your wounds. It is strange that you don’t turn your back on your face.

So even if Wang Guan saw any clues, he would not say anything casually. Besides, Professor Liu was not in the mood to listen at this time. After entering the study, he immediately took out his pen, ink, paper and inkstone, intending to verify his judgment.

Paper is the best rice paper, the pen is the lake pen in Jiangnan, and the inkstone is the Duan inkstone that brings breath and produces fluid. As for ink, it is naturally not simple. It is a special pine smoke ink ingot. Calligraphers and painters today generally use high-end, atmospheric and high-end ink ingots. Ink or something is a low-end thing and can no longer be on the table.

Using ink ingots is naturally not only a retro style, but also an elegant style, but also a concentrated one that is the essence. The ink grinding with ink ingots is as ink as paint, and is shiny and has a better quality than ink.

Of course, Professor Liu is using ink ingots now because of the need for mixing. At this moment, he cut a little so-called fluorescent glue from the box and put it in the inkstone, then dripped a few drops of water, and then held the hard ink ingot and grinded it.

While the fingers were evenly running, the glue showed no sign of melting. However, Professor Liu was also very patient, constantly grinding, crushing, and pressing, and a lot of ink came out, but the glue looked like ketchup and did not melt for a long time.

Seeing this, Wang Guan and Yu Feibai looked at each other, their eyes full of suspicion.

This seems wrong. According to Professor Liu, the glue should be able to melt in the ink. Then, writing with this prepared ink can achieve the effect of fluorescence at night.

But now it seems that there is no sign of dispersion of the rubber root, which can prove that Professor Liu's inference is incorrect.

Of course, Professor Liu could not give up so quickly and was still grinding hard. Seeing this, Wang Guan shook his head gently, walked away a few steps boredly, and continued to watch the collections on the shelf.

It can be seen that although Professor Liu's collections are a bit messy, they also have a certain special collection trend. Among the many items, there are more room-type tools.

Among them, the main items are small objects such as pen holder, pen holder, pen hanging, pen washing, ruler, arm rest, etc. The materials of these things include jade, bamboo, wood, tooth and corner ceramics, etc., with different shapes and exquisite carvings. They can be appreciated, which is also considered good.

Of course, there are also large items. For example, Wang Guan saw a large-bellied vase, which was nearly fifty centimeters in height and colorful patterns on the surface. It looked very similar to a colorful vase in the Qing Dynasty, but the painting skills were too poor, or the roots were not as good as painting skills, but were directly glued on with decal paper. If you look at it a little, you will know that it was a modern craft work.

However, Professor Liu should know the background of this big-bellied vase, otherwise he would not have been put in the corner.

Wang Guan smiled, his eyes flashed across the corner, and suddenly saw something, and then he couldn't stop moving. His eyes looked at him straight, surprised, happy, and unbelievable. Anyway, his mood was very complicated.

Others did not pay attention to Wang Guan's abnormality and were still paying attention to Professor Liu's ink grinding. When they found that the glue in the inkstone had not yet melted, Yu Feibai finally couldn't bear it anymore and said tactfully: "Professor Liu, after grinding for so long, you should be tired, so why don't you take a break?"

Professor Liu turned a deaf ear and continued to grind the ink. There were more and more plump and shiny ink, but the glue was round or flat, forming a variety of strange shapes under the crushing of the ink ingot, but it did not melt.

Under such circumstances, Professor Liu was a little irritated and eventually threw away the ink ingot. Because of his excessive movement, he even vibrated the inkstone and splashed a bunch of ink to pollute the snow-white rice paper on the table.

For a moment, there was a bit of chaos on the table, and Professor Liu didn't mean to clean up. Instead, he picked up soap and slowly cleaned his hands in the basin next to him. His face was serious, but his eyes could not hide his disappointment.

"Professor Liu, you don't have to be sad."

At this time, Wang Guan woke up in shock, looked back and immediately understood what was going on. With a lot of thoughts, he comforted him: "Even if this thing is fluorescent resin, after thousands of years, or has undergone some qualitative changes, it has no effect as it was..."
Chapter completed!