At present, the foreign exchange reserves of most domestic banks are only pounds, dollars, euros, Japanese yen, Hong Kong dollars and other currencies.

The ruble you mentioned is the legal tender of Russia, but it is not the currency in circulation all over the world.

Therefore, the following suggestions are for your reference:

1. The Chinese bank with the largest foreign exchange reserve currency is Bank of China. I suggest you call the Shenzhen headquarters of China Bank to see if you can exchange money, or go directly to consult and handle the exchange; If China Bank doesn't change, then other China banks don't have to ask, and of course they won't change.

2, you can also try to consult foreign banks in Shenzhen, maybe they have this reserve;

3, looking for the black market ... Hehe, it is generally not recommended.

I hope I can help you! ^_^。

Thank you.