Beijing, Shanghai, Hong Kong, and Macau in 10 days
Days 1-3: Beijing: see Three days in Beijing.
Day 4-6: Beijing to Shanghai transportation: take airplane (2 hours travel time) or bullet train (5.5 hours travel time). Check Beijing-Shanghai transportation for more info. Which ever option you chose, make sure to start your trip early, so you could have half a day for Shanghai sightseeing.
Shanghai: visit Shanghai as described in Shanghai travel guide.
Day 7-9: Shanghai to Hong Kong transportation: take airplane (2.5 hours travel time). Check Shanghai-Hong Kong transportation for more info.
Hong Kong: visit Hong Kong as described in Three days in Hong Kong.
Day 10: Macau: make day trip to Macau from Hong Kong. Click here to see how to travel from Hong Kong to Macau.