> Few customers outside China really want those.
Hence probably why China is pushing other countries to use Yuan as an exchange currency?
This is one of the aspects of "RMB internationalization" strategy https://en.wikipedia.org/wiki/Internationalization_of_the_re...
Customer wires USD 1,000 to bank B to the account of business A as payment for the goods.
This money does not go directly to the account of business A.
Bank B sends USD 1,000 to Central bank and gets RMB 7,000 (or whatever the exchange rate is) which go to the account of business A.
Bank B ends up with deposits almost entirely in RMB to loan out. Few customers outside China really want those.
Compare with a situation in which bank B kept its USD on the books as customer deposits. Then it would have USD to loan out, and the market for such loans is much bigger.