Hong Kong residents are required to carry an identity card. To avoid any possible confusion, visitors are advised to carry at all times a similar form of photo identification, such as a passport. Most major hotels provide hair dryers and other amenities. The government-run water supply more than satisfies United Nations World Health Organization standards. Care is necessary only in some rural and island areas where water is still drawn from wells.
Bottled water is widely available in hotels, restaurants and convenience stores.
Most hotels have a medical clinic, with registered nurses. Hong Kong's medical facilities are among the finest in the world, and many of the territory's registered doctors and dentists were trained or have undergone postgraduate training overseas. All 17,500 taxis are licensed, air-conditioned and metered, with differing flagfalls. Most are licensed to carry up to five passengers. Although many drivers understand English, visitors are advised to ask their hotel's information desk to write down their intended destination in Chinese, or ask the hotel doorman to tell the driver.