In the end you are getting married no matter which country you get married in.

As for coming back to China. As long as you have a valid visa and passport and she has the same you should have no worries.

if you marry in China first, it might be easier for her to go to the states later on. but still she needs to go through an interview at the US embassy.
a friends friend didnt have a problem obtaining the visa to the US after marrying in China first

It makes no difference if you marry her here, or in USA.  Or you could do as one friend of mine did, he got married here to please her wife's family to see her married before leaving, and married her again in USA after arriving there.  He has now two different married certificates, one from each country.

A lot of people will get married in China and then register their marriage with the US embassy.  That way you only need to get married once and the marriage is recognized in both countries.

If you marry her in the US, you will need to get a certified translation of your marriage certificate for proof of marriage in China.  (This is what I had to do since I married my wife in the US.)

However, just because you marry a woman in China, does not mean she will automatically get a visa to the US when you go home.  You will want to make sure that the both of you meet the requirements before you marry.  Otherwise, if she is turned down for a visa, things can get very, very sticky.

Register in the US Embassy in Hong Kong.

For more information - check out the US CITIZEN SERVICE:
http://hongkong.usconsulate.gov/acs_marriage.html

you get a list of choices of where you want to marry at.

Agree with the posts here. You can marry in the US or China. YOu will be legally married regardless if you marry in either country

This can be a very difficult question to answer. Just to let you know a little about me I talk with and dated and later married a Chinese lady. I went to China to do so (did not marry in China) and love being in China. I taught school their for 4 years. I was concern about her feelings and how she would feel about America. It is very difficult to understand all the emotion from your Chinese lady. I know that in acquiring a visa to USA would take years but after doing my research I decided a fiancée visa would fit all our needs. This took 5 months to acquire the fiancée visa. If we had married in China the Visa would take a very long time. I hope I have answered your questions and Good Luck to you and the Misses.

A marriage that is legal in China is often also legal in your own country. It will always be easy for you to return to China at a later date to live-- either on a family or work visa. The opposite is true of going back to the US. Prior to marriage, you should research very carefully what is required to get your spouse a permanent visa for the US (incl. the financial requirements). Also, determine the level of family support you would have were you to return to the US together. It all depends on your personal circumstances, but do not underestimate how difficult it may be to get your wife back to the US.