In Hong Kong the family name comes first, so Wong Man Ying would be addressed as Mr Wong. Most entertaining takes place in restaurants rather than in private homes. Usually informal and normal courtesies should be observed when visiting someone's home. During a meal a toast is often drunk saying Yum Sing at each course. It is customary to invite the host to a return dinner.
Informal wear is acceptable.
Some restaurants and social functions often warrant formal attire. Smoking is widely acceptable and only prohibited where specified. Small tips are expected by taxi-drivers, doormen and washroom attendants.