Hong Kong has two types of formats for an account number. The format that we need is the example below. The account number must be between 9-12 characters.
Branch code - the first 3 digits
Account number - the following 6-9 digits
The 'Branch Code' and the 'Bank Code' are different. These numbers can be double checked here.
In this document the 'Bank Code' is written as 'Clearing Code'.