I'm posting this in case someone from Iran is in a similar situation and is searching online for a solution. Finally, I managed to open a bank account. This should hopefully clarify that there is no blanket regulation banning Iranians from Hong Kong banking system. I have also exchanged emails with the Hong Kong Monetary Authority confirming this fact. It is indeed merely the institutional racism of those banks that have such an internal regulation that causes the problem. I can confirm that Dah Sing bank opens accounts for Iranian nationals. The services are very basic, but I can suggest this bank to anyone who is in such unfortunate circumstances. I have heard that Bank of East Asia also opens new accounts for Iranian nationals, but I cannot confirm that. I applied for their most basic banking service over 2.5 months ago, but haven't heard anything back yet. I applied to 18 other banks. All rejected my application!