I have dealt on a professional (property) basis with Chinese from Hong Kong and Mainland, in the UK. You could always trust a Hong Kong guy to pay your bill, and would not disappear without paying rent. The Mainland guys (and gals) ignore you, ride roughshod over any agreement, are always late in paying bills/rent and are generally much harder to deal with. They have no understanding of loyalty, of apology or simple business etiquette.