The word "open the door" is a term in the collecting world, and it now appears frequently in heaven. It is generally believed that "opening the door" is the true meaning of things. It is learned on the Internet that "opening the door" is a simplification (abbreviation) of "straight to the point", which means that the appearance characteristics of a collection, surface gloss (such as wrapping pulp), text patterns, natural wear and tear, etc. are in line with the specifications of the genuine product.
In terms of coin collection, especially silver dollars, the meaning of "opening the door" seems to be a bit popular. The silver coin that "opens the door" should be a "one-eyed goods", and there is no doubt that it is genuine. In the TV treasure hunt, the word "open the door" that I saw seemed to be used by experts.

Personally, I think that "opening the door" and "authenticity" cannot simply be equated. The "open door" thing must be genuine, that is: opening the door = genuine. But genuine is not the meaning of "opening the door", that is, the real thing ≠ open the door.
We often encounter a genuine silver dollar that we have to look at carefully to determine, so that such things can not simply use the word "open the door".
In terms of silver dollars, the "open door" thing should meet the following characteristics:
One is the pulp, the old silver dollar if there is no artificial destruction must have a natural pulp.
Second, the superficial characteristics, genuine silver coins should conform to the basic characteristics of the official (private and local versions aside) (not some fabrication).
The third is natural wear, such as edge teeth, text patterns and other natural flow traces.
Can't a silver dollar without a pulp be able to use the word "open the door"? Not necessarily.
If it is washed with clean water (or the potion does not damage the surface much), the pattern is clear and recognizable, especially if the characteristics of the version of the coin are obvious (non-re-engraving, repair, etc.), the word "open door" can still be used. That's my personal opinion. Whether "open the door" is casually available, I believe that everyone will be inspired after looking at the feelings of the following collector.
【Transfer】
After 10 years in the industry, there has been no progress in the level of identification. On the contrary, because of the convenience of work, I learned some about the difference between Westerners when buying and selling antiquities and Chinese. To Shaanxi, Henan, Shanxi, the western region and even as far as the White Mountains and Black Water, when visiting the market in the motherland, when you ask people about this thing, whether it is copper, porcelain, stone, the seller will split the first sentence, "This thing is very open", this 5 words, we have listened to enough, "open the door", "do not open the door". The two words "open the door" are worth thousands of dollars.
But what is the opening of the door? With a key? Having a key doesn't necessarily open the door. If I ask the shopkeeper how to open the door, he will say, things are real, first-class, everyone pay attention to the few words here are not a little scientific data existence, "things are true", "first-class", "open the door", these are all words related to reputation, that is to say, guests buy with credit. The question arises, in case you are a person who has not been exposed to antiquities, how do you want people to believe you? This already involves the issue of the marketing of goods.
Why do I say that? I've tried telling a lot of foreigners that it's very "open door", and no matter what it means to open the door, they will ask: how to know? (How do I know if it's true or not?)
Is there any scientific identification? When I say there is no proof, they all look at me with strange eyes, maybe he means, how to buy without proof?
Some people may say that such an open door thing will not look at, how the level is so poor. But we can't walk when we're born, and so are antiquities, and everyone has the opportunity to buy a fake. It feels like they say that when they open the door, they have a feeling of looking down on other people, thinking that they know everything and are superior.
But how to introduce antiquities to guests, this is a very important science, if you can successfully introduce antiquities to guests, it is a very important thing, some people may say, we only do connoisseur business, or just collector business, then the circle of guests is too small.
In some big experts in Europe and the United States, they will basically do some scientific inspection data for everything, of course, some antiquities can not be checked, but they will use the method they can, in order to make guests have more scientific understanding.
In fact, this is also another important issue, that is, the issue of cultural promotion, when we see many connoisseurs or auction houses protecting the motherland culture and carrying forward the culture of the motherland, how can the small circle promote Chinese culture? For example, in the face of some people who do not know what is called the Liang Sea Beast Grape Mirror, how do we let the other party know more, which is the same as the reason when the connoisseur sells goods, taking the Sea Beast Grape Mirror as an example, the Tang Dynasty Sea Beast Grape Mirror has a variety of forms, but if it can be clearly said that it is the first grape mirror, then there is the sea beast mirror, then there are grapes and sea beasts, and then there is the beam, and then there is a double dragon or peacock in the inner circle, so step by step, people will know the context of development.
If the times want to progress, when can we replace the word "open the door", then the day of international integration may not be far away.
Every day is called "open the door", whether it is "opening the door", really not many people know, or the small circle of people (this circle does not have any pejorative meaning) to know, sometimes we may find that we have been opening the wrong door.
There is a sky outside the sky, and the world is too big.