Nantong is a safe city to visit and live in.  Foreigners are typically not targeted by criminals.  This does not mean that there is not any crime against foreigners.  Anyplace that you have people, there will be crime.  Having said that, there is a considerable amount of "social order" in Nantong, and reports of crimes against foreigners are rare. The most commonly reported crimes are thefts of property when the owner is not present. 

The use of or possession of drugs in China is illegal and the penalties are stiff and severe. Do not think for a moment that just because you are a foreigner that you or your drug use will be ignored by the authorities.  

Drunk driving, or driving under the influence of alcohol or drugs is also illegal.  If you are involved in an accident, and there are injuries, you can be held liable for both criminal charges and civil liabilities, prior to being deported.  Taxi cabs are abundant at all hours in Nantong (see Nantong Transportation) and inexpensive.  Be smart, take a cab when impaired.  Traffic in Nantong can be "disorderly" and an ounce of prevention is always wise.

Traffic laws in China, and Nantong may be different from what you are used to.  Typical Western traffic courtesies are not apparent in China, which requires strict concentration when driving any type of vehicle.  Nantong drivers seem to drive "with their horns" which can be both distracting and a blessing when in traffic.  Whilst typical Western style traffic laws are on the books, how they are interpreted by other drivers and the police may be a different issue.  The best advice that can be given is to always drive defensively, and try to anticipate what everyone around you might and possibly do.  The "right of way" is probably best described as "whoever gets to any point first has the right of way."  Whilst that may be the unofficial policy, do not count on it. 

Despite a low crime rate, use common sense in Nantong.  If you invite crime, it can happen to you, and basically, you will find little sympathy if you are the victim of a crime.  Use the same levels of common sense that you would use in your home country.

Lock up your valuables.
Don't leave your cell phone laying around.
Don't wear fancy jewelry when walking around, just because you have it.
Don't display large quantities of cash.
Walk with a group or in well lit areas at night.
Consider all stray animals to be dangerous.
Avoid letting strangers into your hotel room or apartment.
Carry your wallet in a secure place.  For men, this is usually in your front pocket.

Using basic common sense should ensure that you are both safe and secure during your visit to Nantong.