The minimum deposit requirement for BOCI is not explicitly mentioned in the provided information. However, for account opening, I know that a cheque for HK$10,000 payable to CNI Securities Group Limited is required. This seems to be the minimum deposit to get started with trading. Since BOCI accepts deposits only in Hong Kong Dollars (HKD), I would need to ensure that I can meet this minimum deposit requirement and have a Hong Kong-based bank account that supports HKD transfers.