Hong Kong Basics

Time: Local time is GMT +8.
Electricity: Electrical current is 220 volts, 50Hz. The UK-style 3-pin plugs are standard.
Language: The official languages in Hong Kong are English and Cantonese. The other main language is Mandarin.
Health: There are no specific health risks associated with travel to Hong Kong. Food and water are safe, although visitors should consider only drinking bottled water for the first few days of their stay. Take precautions against mosquito bites, as there is a risk of Dengue fever. Hong Kong's health facilities are first class, but expect to pay cash. Medical insurance is advised. Cases of bird flu have been reported and although the risk for travellers is low, all close contact with caged, domestic and wild birds should be avoided, and all poultry and egg dishes well cooked.
Tipping: A 10% service charge is usually added to restaurant bills, but waiters will still expect some loose change in addition to this. If no service charge is included, a 10% tip is expected. Taxi fares are rounded up to the nearest dollar (usually automatically by the driver).
Safety: Hong Kong is a safe travel destination although caution should always be exercised when travelling to any city. Pickpockets are likely to target unsuspecting tourists so one should minimise these incidences through vigilance. Be wary of accepting drinks from strangers, as reports of spiked drinks are increasing. Robbers have recently targeted walkers in Hong Kong's Country Parks so it is advisable to stay on marked trails and not to carry large amounts of cash or credit cards. The typhoon season is usually between April and October, which may cause flooding and landslides.
Customs: Littering and spitting are illegal in Hong Kong and will incur on the spot fines. In Hong Kong the concept of 'face' is very important; avoid causing someone to 'lose face' by publicly insulting them or contradicting them in front of others as this is a general 'no no'. The Chinese have great respect for hierarchical relationships.
Business: Business in Hong Kong is conducted efficiently and formally and punctuality is important. It is advised to allow for sufficient travel time before meetings considering the high traffic congestion. Suits and ties are the norm and it is customary to exchange business cards (printed in English on one side and Cantonese on the other) at the start of a meeting, along with a handshake. Business cards should be given and received using both hands, with the Cantonese side facing the recipient, and should be treated with respect. It is common to greet the more senior or elder person first. Business entertainment is usually in the form of a lunch or dinner that is organised by the hosting partner. Food is also usually ordered and paid for by the host. It is not unusual to exchange gifts, but they are opened at the meeting. Business hours are usually from 9am to 5pm, sometimes later on weekdays and some businesses also open between 9am and 1pm on Saturdays.
Communications: The international access code for Hong Kong is +852. The outgoing code depends on what network is used: 001 for PCCW, 0080 for Hutchinson and 009 for New World. City codes within Hong Kong are not required. The local mobile phone operators use GSM networks and have roaming agreements with most international operators. Mobile phones can also be rented on arrival at the international airport. Internet cafes are widely available, and access is free at many coffee shops, shopping malls, MRT stations and public libraries in town.
Duty Free: Travellers to Hong Kong over the age of 18 years do not have to pay duty on 1 litre of spirits or wine, 200 cigarettes, 50 cigars or 250g of tobacco. A reasonable amount of items for personal use is also permitted. Prohibited items include narcotics, psychotropic drugs, firearms and ammunition; counterfeit items, endangered species (alive or stuffed), and copyright infringed products.