Today: Canadian Chamber of Commerce workshop: 'How to communicate more effectively in your daily business correspondence'. Duke of Windsor Building. Tomorrow: French Chamber of Commerce breakfast: 'China's contribution to the post-crisis world order'. China Club. Australian Chamber of Commerce luncheon with John Brumby, premier of Victoria. Conrad Hong Kong. Australian Chamber of Commerce luncheon: 'Green retrofits and adding value to existing office buildings'. Tai Yau Building, Wan Chai.