So Huang Shi asked, "What does it mean to scan a barcode on a computer?" ”

"Just like the tickets for the "World Expo" and the like, we have a separate number on each voucher, you can use the code scanner to scan it, you can determine the authenticity, and this number is not arbitrarily made up, there is a problem involving an encryption algorithm program. ”

"Oh, that's it, so what about the purple light, is it the same as the RMB, there will be numbers and avatars?"

"Yes, that's it, anyway, when the purple light shines, what comes out is a hidden picture generated by the fluorescent ink mark."

After listening to this, Huang Shi nodded secretly in his heart, in fact, it stands to reason that no one would have the ability to make "fake money" in the 16th century, after all, they have neither raw materials, nor color printing presses, but there are one or two "holy hands in the painting" can really rely on bald pens to copy out the money, and Huang Shi can only admit it.

However, he couldn't tell Qi Ye that he didn't want any anti-counterfeiting marks, because that would make Lao Qi suspicious, so he said, "Okay, anti-counterfeiting is according to the two ways you just said." By the way, Lao Qi, I'm worried......"

"What are you worried about, you're not going to worry about the quality of our defense, are you?" Qi Ye may have misunderstood, so he said, "If you are afraid that these two anti-counterfeiting effects are not enough, we can also provide you with a pattern anti-counterfeiting." ”

Qi Ye was afraid that Huangshi would not understand, and then made an explanation, "The anti-counterfeiting patterns we wrote on the voucher, you look at it as a bunch of cumbersome vector patterns, but if you take a special PVC network to press, it will show a few words, if the printed dots are reprinted clearly enough, these words will not be displayed." ”

After listening, Huang Shi shook his head and said, "No, I'm not worried about anti-counterfeiting, because according to you, these vouchers are no less than genuine banknotes in terms of anti-counterfeiting technology." What I'm worried about is whether it is waterproof or not, and whether it will fade, which is the most critical. ”

Lao Huang washed clothes several times, pulled the banknotes in his pocket, and only found out when he dried his clothes, but as long as they were put in a cool place, after the water evaporated, it was a new and old feeling.

"Hehe, Lao Huang, I just told you, our paper raw materials are high-grade reinforced anti-counterfeiting paper, not only high hardness but also waterproof, but anti-counterfeiting paper and banknote paper are only relatively waterproof, you will still rot if you knead it. As for the fading problem you mentioned, I'll tell you the truth, including the real banknotes we use now, they will fade, but this fading is measured in decades and hundreds of years. ”

Looking at Lao Huang on the other side, who seemed to be a little unconvinced, Qi Ye continued, "Lao Huang, otherwise what do you say, our country will recycle old banknotes and reissue new banknotes every ten or twenty years, that's the reason." ”

Huang Shi only said "oh", because Lao Qi said about the issuance of new banknotes and the recycling of old banknotes, when he was thinking about the currency in the previous paragraph, he had studied the process of these, and what Qi Ye said was only one of the small reasons.

In fact, the change of banknotes is simply an experience that every country has had, and the most important reason is to adapt to the anti-counterfeiting requirements of the new era and improve anti-counterfeiting technology to achieve the fundamental purpose of anti-counterfeiting. Of course, there are such things as regime change, inflation leading to a large change in the face value of the ticket, and so on. As a developed country or a developing country with a stable economy, this first is the most fundamental reason.

And there will be different layouts of banknotes in different periods, and at the same time, there will be different layouts in circulation at the same time, and the layouts are constantly updated. The recycling of old banknotes varies from country to country, and there are three main ones.

First, after the issuance of new banknotes, the old banknotes will not be declared to be out of circulation, but will no longer be released after being withdrawn by the bank, and the circulation of old banknotes in the market will be gradually reduced until all of them are recovered. Currently, most countries use this approach. It has the advantage of a smooth transition and little impact on society. For example, this method is used in the recovery of US dollars.

Second, at the same time as the issuance of new banknotes or a later period of time, the old banknotes are declared to be out of circulation, but for a considerable period of time, they can be exchanged at the issuing or designated banks, and the old banknotes will be invalid after the exchange period is over. Typically, some countries that have joined the euro have adopted this law, such as Greece, France, and Italy, which stipulate a 10-year exchange period, Portugal 20 years, and the Netherlands 30 years.

Third, after the issuance of new banknotes, the old banknotes are out of circulation and quickly become invalid. A typical example is the second version of the "Su three coins" of the renminbi, that is, the 3 yuan, 5 yuan and 10 yuan of the 53 version, and it took only a short month from the notice to the invalidation. For example, Vietnam's new banknotes were issued in 1978, and the exchange time for the old banknotes was only 3 days, and all of them were invalid when they expired.

Therefore, it is a very common phenomenon to change and recycle banknotes in various countries, and the time of changing the version in each country is not uniform, about 10-15 years for a cycle, and most countries will change the version once. Of course, there are a few countries in modern banknotes, such as China's third edition and the West German mark, which have been used for 30 years. This will also depend on the actual situation in the country.

……

Seeing that Lao Huang only said "oh", Lao Qi Zhilu said that he didn't believe it, but he didn't have more explanations this time, just said, "Our printed vouchers will not be too far worse than the real banknotes, and you can rest assured that it will slowly turn yellow and dark little by little for decades." ”

After Qi Ye finished speaking, he slapped the table again and said, "The specific one is like this, how about it, Lao Huang, do you still have any questions?" ”

Huang Shi "um" for a moment, looked at Qi Ye and said, "By the way, did you say that high-end anti-counterfeiting paper is the same as banknote paper?" ”

Qi Ye sighed in his heart, I don't know why Lao Huang Weilu has to be so obsessed with the texture of the paper, the guests who made vouchers have never asked for it so much in the past, but he couldn't help but ask, so he had to say, "Don't say too much, the kind of real banknote anti-counterfeiting paper you want can't be bought at all, and there is no place to buy it if you have money, and if you make vouchers, I can't help you print it according to the real banknote." ”

Hearing Lao Qi say this, Huang Shi felt that he had no score in his heart, so he proposed it to Qi Ye, "Okay, Lao Qi, then is there any ready-made one in your factory now, let me see it first?" ”

"Do you mean security paper? No, it's used too little. Seeing Lao Huang's look of disbelief, he said again, "We really don't have this kind of anti-counterfeiting paper in our factory now, Lao Huang, if you really want to see it, so let's come over tomorrow morning, I'll let you get a few styles for you to see, how about it?" ”

Huang Shi was a little embarrassed, because he was going to accompany Ning Fan to Guangxi tomorrow, how could he have time to come, and once this matter was delayed for a few more days, the New Year's Day of 2014 would come, so he didn't want to break his word and get fat.

"That's it, Lao Qi, can you just let someone get it now, I'm just going to do a few things now, and when I come back in the evening, I'll invite you to dinner, let's talk while eating, okay?"

"Okay, then I'll send someone to get it, and we'll see you later." Qi Ye originally wanted to tell Lao Huang that he wanted to go home to accompany his wife, after all, his wife was pregnant now, and he had to go back for a walk with her every day, but seeing that Lao Huang seemed to be in a hurry, he had to agree to this request.

……

When Qi Ye dialed the phone at home, thinking about how to explain to his wife. Huang Shi had already left the gate of "Xianqin Printing", drove straight to his parents' house, and when he returned home, his parents were naturally overjoyed, and his mother also asked his father to go to the supermarket to buy a few more of his favorite dishes and come back, ready to celebrate his successful return from Canada.

However, Lao Huang obviously disappointed his parents, he stopped his father who was going out, saying that there were still some urgent matters to deal with in the past few days, and he would not be able to go home after a while, and then took out all kinds of gifts he bought for the second elder in Canada, and then he drove away in the car under the reluctant gaze of his parents.

Huang Shi drove the car and visited several relatives and friends, such as his cousin-in-law Jiang Hualong and Dr. Chen Lishui.

It's just that at the end of the day, when he was about to go to find his old classmate Wu Guangzhu, he found that no one answered the phone, and he called several times and no one answered, so he shook his head, "This old pig, what the hell are you doing?" It's not going to be a cosplay again. ”

Thinking of the various cosplays that the old pig has participated in, Huang Shi can't help but laugh from the bottom of his heart, he doesn't look like the prince when he wears a dragon robe, for example, he likes to wear a "****" uniform to take photos, but unfortunately he doesn't look like "Chu Yunfei" no matter how straight he pulls the uniform, but more like "Chen Xiaoer" in "The Protagonist and Supporting Role".

No one answered the phone, and Huangshi had to drive only to the "Han and Tang Cultural City", the "ancestral" antique shop of the old pig was opened here, and it was already evening, and it was a good time for the night market and shops in this area to open for business, so Huangshi got out of the car and saw all kinds of young ladies floating in front of him.

It's a pity that during this most prosperous period, Huangshi saw that Lao Zhu's antique shop was locked by an iron general, and the room was already full of dust.

Lao Huang turned around and saw that several night clubs around had opened their doors, and the beauties were coming in and out. And several other antique shops are still full of guests, "Is this old pig also sick?" ”