China is generally safe for foreigners though there are some things travelers should be aware of. Crimes against travelers are usually petty thefts rather than violent crimes. It's best not to leave valuables in your hotel room while you're gone. Take advantage of their security box if they offer one. General safety precautions and common sense should be used.
When taking a metered taxi, the driver pushes down the medallion at the start of the ride this engages the meter. If your driver should fail to engage it, remind him to use the meter. At the end of the ride, pay the amount shown on the meterthe only surcharge may be highway toll fees. Taxi drivers don't expect tips. You can ask for your receipt which will list the driver's identification and company telephone number. These are useful numbers to have if you've left something in the cab or wish to lodge a complaint.