Hong Kong and Macau are very modern destinations and additionally well integrated and familiar with western cultures.
There are therefore far more tolerant attitudes to foreign practices and less sensitivity to the taboos, which typify other destinations in the area. In common with China, however, superstition regarding colour and number is a feature of everyday life.
Never point at a person, or touch their heads. In general local are not used to being touched by strangers, so tapping, hugging or putting your arm around someone is likely to regarded as a violation and cause unintended offence.
The standard greeting for foreigners amongst the Hong Kong people is the handshake, which applies universally among men women and children. Accompanying the handshake, which involves a lighter touch than the western handshake, a slight bow can be used to emphasise respect.
Do not point at things, especially religious objects. If you need to attract attention, motion with the palm of your hand. Winking is considered rude and frowned upon.
Avoid political comment, criticism and demonstrations.
Overt public displays of affection between couples is frowned upon, particularly in traditional areas, and shows disrespect to the native culture.
Tipping for services in Hong Kong and Macau is in general unnecessary but will be accepted by Taxi drivers, tour guides, restaurant and hotel staff.
When dining, Chopsticks should be used only for eating and never employed as a means of gesturing, drumming or placing in your hair. On no account leave the chopsticks pointing straight up as this is traditionally interpreted as a curse or omen of death. Knives and forks are readily available in restaurants. When eating with your hand, never use the left hand.
In Hong Kong, it is not uncommon for diners in some restaurants to be seated at a table with other diners. The usual protocol for locals, is not to interpolate.