China

Tour guides maybe expect it, otherwise not. Taxi drivers in Beijing, Shanghai and most other Chinese cities are not accustomed to tipping at all because they are required by the law to give a receipt to every passenger. Therefore, no tip necessary. It's a different story in Hong Kong.

Tipping is not a part of Chinese culture or tradition, and several establishments actually have a strict no tipping policy. This includes restaurants, massage studios, etc. The only place where a tip might be expected is at a high-end hotel catering to western tourists. And the only reason tipping is expected there is because western tourists have conditioned the behavior. If you are using a tour guide for your trip to China, a personalized gift would be more appropriate than a tip.

Hong Kong

Tipping in Hong Kong is the way to go ! In Hong Kong, just like the many parts of the world, tipping makes the world go round.

Some guidelines in Hong Kong: Taxi drivers will usually round up to the nearest dollar amount as a tip to himself. For example: if the meter read $ 16.40, then you would pay $ 17.00 and the taxi driver will most likely NOT give you back the small change.

For bellboys- $ 5-$10 per piece of luggage carried for you.

Restaurants- a 10% service charge is usually already included in most restaurants, unless specified NO service charge. One usually leave the coins (if paid in cash) or if by credit card, then you would round up to the dollar amount you wish to leave as tip. Leave more if you are happy with the service, leave none if you are not happy at all.

Hotels and fine dining restaurants sometimes charge 15% as service charge, especially for large groups usually over 10 guests.