There were domestic cameras in the Republic of China.

This coin is fake. It is made of real money. The original ticket was an official fee of 3 100 yuan issued in the 19th year of the Republic of China (1930).

This coin has several obvious defects:

At that time, the official gold 30 was valuable, with the highest denomination of 100 yuan. It is impossible to issue such a large denomination-5 million, and the banknote number is 7. If it is true, it means that money was issued at that time and inflation was very serious, but it was not.

Mystifying, the watermark simply turns Sun Yat-sen's head into Lin Sen's head, and there are others like "Citibank" and Dragon Phoenix Tiger. The front is the "Central Bank" of China, and the watermark is the "Citibank" of the United States. How can a banknote have two different banks and belong to two different countries?

Where there is a denomination, there is hair, because the counterfeiters erase the denomination originally printed on the paper money and print their own "5000000". And this operation will inevitably make paper money fluffy and thin. It can be verified by touching and light transmission (the light transmission is obvious at the modification).

I don't know how the so-called expert you mentioned verified the paper money, but it can be said that this thing is true. This kind of fake is very common among the people, and it is often used by swindlers as a prop to cheat, saying that this banknote was left by someone and can be exchanged permanently at Citibank ... People who are experienced in playing coins can see at a glance that it is fake. Although you may not like what I said, it's true.