A person went to a domestic Chinese bank to exchange foreign currency. At the same bank, the same counter, and with the same teller, the following USD cash exchange prices appeared: buying USD cash: 7.43 RMB for 1 USD. Selling USD cash: 1 USD for 6.53 RMB. The difference was 0.90 RMB per USD. If an ordinary person completed one buy-and-sell cycle at the bank, they would instantly lose about 12%. Behind this phenomenon is not merely a simple bank exchange spread, but possibly the continued strengthening of foreign exchange controls and increasing uncertainty risks for the future.