What can I bring back when I go shopping in Hong Kong? What can I not bring back?

It depends on your luck. Suggestion: If it is a watch, throw away the packaging and wear it directly on your wrist; If it's an electrical appliance, throw away the packaging. If the customs inspection says it's from home when you go, you must give a tip. In principle, many people go through the customs, and they don't have the time and energy to check your luggage unless you look flustered and different. But there are also unlucky people, with a probability of 3%. Hehe, look through the old calendar books and see if you are suitable to go out that day. Ha ha.