Thanks for your reply.
I also have a issue that can I use parameter "patial_match=true" which
is the property of(geocoder.geocode) results[0]to trace all the
cases that
result go to political center?
Because I find that request address both "ss,Beijing" and "三里
屯",Beijing are return "APPR
The GeoCoder returns a field labelled "location_type," which for an
exact hit will be "ROOFTOP." In your case where it was unable to find
the complete address, it would probably return "APPROXIMATE" or
"GEOMETRIC_CENTER" depending on how much it was able to find.
I discovered that addresses with