The key is to get someone in the bank that is good.
Everything depends entirely on who handles your a/c.
Every HKG bank is well versed in the subtleties of working internationally, but the quality of the customer interfaces varies from branch to branch.
Shop around.
Talk to folks thoroughly.
China is very much into social networking and building social capital: you have to INVEST time and sincerity into a relationship. Once you succeed, everything works with lightning efficiency. Get to know them. Let them know you as entirely as possible. This is a trust-based economy that applies to the lowly foreigner too.
Once you find your ideal customer service interface, nourish the relationship with a steady supply of _colourful_ touching little gifts.
Score extra points for dropping in only to drop off such a little gift.
Note the Chinese weakness for exquisite chocolate. For her birthday, work through a colleague who flies into/out of BRU.
Remember that if you treat them as mechanical service providers, they will treat you as a secondhand ATM in need of repairs they will feel no special incentive to provide.