This is something I'd bumped into last week. I'd received a fairly large monetary gift of RMB in the recent past and was converting it over time to a combination of USD and JPY. I know of the 500 USD per day limit, however when I tried to exchange for a second day, when the teller asked a manager to come authorize the exchange, I was instead told that my activity was "abnormal" and that they wouldn't let me. They said that I'd done it "too often" and that even if they allowed it, SAFE would come after me. For context, I'd been in China 6 times this year, and done one or two exchanges per visit. Is this just the bank being weird or are there actually further restrictions beyond the daily limit?