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The Chinese police (locally called "Public Safety Bureaus") is a well-known monitor of any communication inside China, including phone calls and Internet data. All unencrypted data transmitted on the Internet (including emails and HTTP transmissions), encrypted Chinese web services (including WeChat, QQ and Chinese-language Skype), and phone calls will be stored for three months in a police database. Any of this data can be used for court evidence if someone is arrested (刑事拘留, xíngshì jūliú).
[[Image:Chu Shi Ji.jpeg|thumb|180px|A domestic desiccant may be useful in eastern China's humid summer]]
Outside major cities, public washrooms vary from unpleasant to repulsive. In cities, they vary from place to place. Clean bathrooms can be found inside tourist attractions (e.g., the Forbidden City), at international hotels, office buildings, quality department stores, and shopping malls. Washrooms in McDonald's, KFC, Pizza Hut, or any of the coffee chains listed in the drink section are usually clean. While those in common restaurants and hotels are barely acceptable, those in hotel rooms are generally clean. Some public facilities are free, others cost from a few mao up to one or two kuai (¥1-2). Separate facilities are always provided for men (男 nán) and women (女 nǚ), but sometimes there are no doors on the front of the stalls.
Wash hands often with soap, or better, carry disposable disinfectant tissues (found in almost any department or cosmetics store), especially after having used public computers; the main cause for a cold or flu is through touching one's face, especially the nose, with infected hands.
There are no widely enforced health regulations in restaurants. Restaurants generally prepare hot food on order. Even in the smallest of restaurants, hot dishes are usually freshly prepared, instead of reheated, and rarely cause health problems. Most of the major cities have chain fast-food places, and the hygiene in them tends to be good. Use common sense when buying food from street vendors. This is especially true for meat or seafood products; they can be unsafe, particularly during warm weather, as many vendors don't have refrigeration.
The Chinese do not drink water straight from the tap, and tourists should not either. All hotels (even boats) provide either a thermos flask of boiled water in guest rooms (refillable by the floor attendant) or - more commonly - a kettle the guest can use to boil water. Generally, tap water is safe to drink ''after'' boiling. Purified, bottled water is widely available and a small bottle usually costs ¥1. Check that the seal on the cap is not broken. Beer, wine and soft drinks are also cheap and safe.
Many drugs are available from a pharmacist without a prescription. It is possible to ask to see the instructions that came with the box. Western medicine is called xīyào (西药).