None of the above is accurate. What you should see is the selling price of foreign exchange. Investment promotion is higher than that of China Bank, which means that if you buy dollars from the bank, the investment promotion will give you less dollars, which means that investment promotion is not cost-effective. I think it's because the Bank of China is relatively more risk-resistant than China Merchants Bank, and it also has overseas institutions, so the US dollar storage is also stronger than China Merchants Bank. I am engaged in foreign trade. I basically use BOC to collect money and then sell it to BOC at spot price. Bank of China feels relatively suitable. It's ok to attract domestic business, and so is overseas business. I hope I can help you with my hands.