Today, HK: Hong Kong General Chamber of Commerce seminar: 'The macroeconomic picture of China' (in Putonghua). Asia Society luncheon: 'A tale of three cities: Hong Kong, Shanghai and Singapore'. JW Marriott Hotel. Tomorrow, HK: Australian Chamber of Commerce breakfast: 'Australia's Hong Kong advantage: Maximising the potential'. Island Shangri-La. MasterCard APMEA Product Conference & Tech Fair (until August 4). HKCEC. Friday, August 4, HK: Hong Kong General Chamber of Commerce luncheon: 'How good is 3G for my business?'.