What cultural faux pas should I try to avoid making in Discovery Bay?

"In Discovery Bay, it's important to respect personal space and avoid touching people unless you know them well. It's also considered rude to point with your index finger, so try to use your whole hand instead. Avoid discussing sensitive topics such as politics, especially China-Hong Kong relations, unless you are well-informed and the conversation is appropriate. It's also considered impolite to be loud or disruptive in public places, as Hong Kong culture values quiet and order. When dining, remember to use chopsticks properly and never stick them vertically into your food, as this is associated with funerals. Lastly, always be punctual for appointments or meetings, as being late is seen as disrespectful," remarked another expat in Discovery Bay, Hong Kong.