Trillion Market Capitalization is Not a Dream

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Looking at Zhao Manfu's exasperated appearance, Zhou Wencheng actually thought of the appearance of CCB's little beauty Wang repacking gold bars for him.

This is not God's will, what is it, since God gave me the opportunity, I naturally have to seize it.

Zhou Wencheng comforted Zhao Manfu and said, "Mr. Zhao, don't be angry. I think this packaging is a little naive. I didn't find this flaw when the bank staff packaged it.

For us, the packaging is a trivial matter, and if the gold bars are real, there is no problem.

The authenticity of gold bars is more important.

Mr. Zhao, just open it and see. "

After listening to Zhou Wencheng's remarks, Zhao Manfu opened the box of the gold bar, picked up the gold bar and pretended to check it.

Finally, he put down the gold bars and said, "I don't know how to check the authenticity of the gold bars.

You are biting with your teeth on TV. Your gold bar is too big to bite. "

Zhou Wencheng smiled and said, "Forget it, I'd better ask a professional."

After speaking, he took out his mobile phone and found the phone number of Xiao Wang, the first branch of Nanshan City Construction Bank in the phone address book. After calling, he said, "I'm Zhou Wencheng, the one who just bought gold bars."

A surprised voice came from the phone and asked, "Hello, Mr. Zhou, did you find out that the gold bars are fake so soon?"

Zhou Wencheng smiled awkwardly: "No.

Because this gold bar is very important to us, it must not be fake. We want to verify it, but we don't know how to verify it. "

After speaking, Zhou Wencheng turned on the phone as hands-free and put it on the coffee table between himself and Zhao Manfu, so that both of them could hear the communication on the phone.

"Then, I guess you called me to ask someone who sells you gold bars to teach you how to verify genuine and fake gold bars, right?"

"Yes, that's the idea."

"Then, can you believe what I say and don't think I'm talking nonsense in order to sell fake gold bars?"

"I believe you won't lie to me."

"Okay, just your brain circuit."

"I'll try to explain it to you."

"Have you seen an ancient TV drama, is there anything that can leave bite marks in it and is gold?"

"yes."

"Then you take it out and bite it now, how about it?"

"Really bite?"

"Of course, this is the simplest identification method, do you understand?"

"I don't know, I'll take a bite."

"Some bricklayers say that real gold usually leaves a faint tooth mark after biting it with teeth. This is because the gold with high purity is a bit soft, and the impure one is hard, and no tooth marks can be bitten."

"I have a bit of a tooth mark on this one. It seems to be real gold."

"Don't worry, the experts haven't said it yet."

"Then go on."

"Experts say that human teeth have a Mohs scale of 6, the relative Mohs scale of gold and silver is 2.53, pure copper is 3, and iron is 4.

Therefore, the Mohs hardness of gold, silver, copper, and iron materials is not high. If you bite hard or bite hard with your teeth, as long as you use enough force, you may leave conspicuous tooth marks.

To sum up, there is no scientific basis for using the bite marks of human teeth to distinguish the true and false gold. "

"Ah, this is it, no, this piece of gold has been bitten and I want to return it."

"You bit yourself, it's none of my business.

There are other identification methods, do you want to continue listening? "

"Why don't you listen?"

"Do you have a magnet in your hand?"

"Not now. If you need it, just find one later."

"A magnet can test the authenticity of gold.

If the gold product contains other metal impurities, **** it with a magnet. If it can be absorbed, it means that the gold has more impurities, which is adulterated gold.

This sentence is true.

But scientific knowledge tells us that there are only three metals, iron, cobalt, and nickel, that can be attracted by magnets.

Therefore, if the gold counterfeiter does not add iron, cobalt, and nickel, the magnet method cannot detect it. "

"Well, that's understandable.

Find a magnet to **** it up later. If it **** up, you must return it to you. "

"Okay, if you **** it up, you can return it. But if you have tooth marks, you can't return it. You have to restore it to the original state."

"Is there any other identification method?"

"Yes. Generally, the density measurement algorithm can be used for general detection, which can exclude some adulterated gold.

The density of gold at room temperature is in the range of 19.26 grams cubic centimeters to 19.37 grams cubic centimeters.

You can choose a measuring cup with higher precision and put a certain amount of water, such as 200 ml.

Put the gold bars into the water, it should be noted that the gold bars must be completely submerged.

Measure the volume of new water to get data, for example, 350ml-200ml=150ml.

This 150ml is the volume of gold bars.

Knowing the mass and volume of the gold bar, the density of the gold bar can naturally be calculated smoothly.

If the calculated density of the gold bar is within the range of the standard value, then the gold bar is more likely to have a higher fineness, otherwise it may be adulterated.

It is important to note that this method can exclude most adulterated gold.

However, if adulterated gold undergoes strict and scientific proportioning, other suitable metals are added.

We can't tell the difference.

For example, counterfeiters have mixed two metals, iridium and tungsten, whose specific gravity is relatively close to that of gold, and cannot be identified by density measurement alone. "

"Well, I see, this is the density method, is there any other simpler identification method?"

"There are simple ones.

Physical bending can also be used.

This method is suitable for thin-sheet gold bars, where the bars themselves can be bent by hand before purchasing.

Gold bars can be bent if they are as pure as pure gold.

If the purity of the gold bar is low and the color is poor, then the difficulty of bending will be relatively high. It is difficult for ordinary people to bend the gold bar with bare hands. "

"It's not suitable for someone as strong as me to use this method, and anything can be bent."

"As much as you brag, can you bend a steel bar?"

"Really. I'm just curious, will the gold bars be broken?"

"Don't worry, don't worry, no matter how fake gold bars are, there will still be a bit of gold, and the ductility after compounding is also relatively good. I haven't heard of anyone taking fake gold bars with their bare hands."

"I understand this method, please explain the next method."

"The next method, I guess you prefer it."

"Oh, let's hear it."

"This method is: burning method~www.readwn.com~ The gold bar is melted with a high temperature flame, and other impurities will be naturally separated from the gold bar.

This method can accurately detect whether gold bars are adulterated.

But it also completely destroys the craftsmanship of the gold bar itself.

It depends on whether this method works for you. "

"It's too inappropriate. It burns out and turns into a lump of gold. How ugly."

"It's really a bit ugly. I've said it for so long, wait for me to drink water and take a breath."

Zhou Wencheng hurriedly muted the phone's microphone and asked, "Mr. Zhao, it is too difficult to identify the true and false gold bars. Do we need to continue consulting?"

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