Opening an account with any bank or securities firm in Hong Kong, Singapore, the European Union and other jurisdictions requires proof of address. FATF (Financial Action Task Force) requires all jurisdictions worldwide to implement similar compliance requirements. Of course, financial institutions need to strictly fulfill their obligation to protect customer privacy information! In recent years, most countries around the world have required centralized cryptocurrency exchanges to implement similar compliance standards. Failure to comply could result in potential regulatory enforcement actions, including fines and criminal accountability of management! At OKX CEX, if a user's account has certain associations with banned countries or identity information similar to sanctioned entities, we will require proof of address to prove that you are not a resident of a banned country or a sanctioned individual on the platform. My own bank account has also been asked to provide various proof materials, and I understand the pain here very well. We are doubling our efforts to reduce misjudgments and improve the user experience of information collection!