It can be sold

But it is a bit difficult to make money. There are foreign exchange transactions in the APPs of major banks. This seems to be a quota of 50,000 US dollars per person!

Buyers can also buy, but after buying rubles, which are Russian currencies, it depends on luck whether they can make money after deducting the spread.

You must know that the bank's foreign exchange is not leveraged, and the principal is the amount required. The profit is very small, unless there is a particularly large increase or decrease, otherwise no objective profit will be seen.

But it can be exchanged directly at Bank of China, but large amounts of funds need to be reserved in advance.