Not an answer to your question, rather a comical story. In preparation for our trip to China, my mother went to the bank and ordered and pretty decent amount of Yen. I had a couple of travelers checks and some US Dollars (plus the required $3,000 US cash required by the orphanage - that made me nervous to carry that around)
So, the first time Mom went to spend her Yen, we happened to be at the hotel. Managers were called, then security and there were conversations in Chinese and glances our way. Turns out, Mom did not know the difference between Yen (Japanese money) and Yuan (Chinese money) and the American with Yen caroused suspicions.
It all got sorted out in the end.