What nationalities are we talking about for you and your future spouse? And are the rules/ laws you are hoping to know about only about China or for when you leave China?

I got married in my country as my Embassy took too long to get my prove of single status. Came back and had no problems as it was translated in Chinese and endorsed by the Chinese Embassy in my country.

If you are American, you can take her home under a finance visa, no need to marry her for two years. That might be something to consider and not be rushed into marriage. Both of you need to prove you are single and to be married. I think all you need to do is go to your embassy and get a note. Get married in China ,then have it register the marriage internationally,, for some reason, it appears not to be.
I'm not sure about part of this, for a Canadian, i can marry in China and apply to bring a wife, it can take 6 to 24 months to process. If rejected it can be appealed. If I some how manage to get a woman into Canada and marry her, then file for citizen sponsorship, if it turned down in Canada, there is no way to appeal it. So i am unsure of USA. basically you need to prove your marriage is legit and not a scam for money. So document your relationship.I did a quick search , this link explains some stuff, do your own paper work.
http://www.immigroup.com/InternationalMarriage/MarriageToChinese.aspx

You can get married here in China, but be warned. If your wife to be is Chinese she will be unable to get something like a tourist visa to the US after you are married. So if you get married here and then want to bring her to the US to visit for two weeks, it's NOT GOING TO HAPPEN. As soon as the government sees that she is married to a US citizen, it automatically begins the immigration process which currently takes up to 2 and 1/2 years.

Here's what I would do: Apply now for a US fiance visa. It takes about 6-7 months to process. You will need paperwork showing that your husband/bride to be can legally get married (IE, they're not already married). You will also need to show bank information to show that you make above (I believe) $30,000usd a year - either have a bank account full of money or pay stubs to show your income. You need to prove that you can financially support someone before they will issue a fiance visa.

Once you get that, you have 90 days (not 2 years as posted above) to get married from your fiance's date of entry into the US. Your new husband/wife will then get a residence permit and visa allowing them to stay in the US for 2 years while the green card process is taking place. Please note that they MUST live in the US for 6 months out of the year to get the green card. During this time your spouse can also take the citizenship classes and become an American citizen with a US passport. The US and China do not have a dual citizenship agreement, so make sure your spouse knows that if they do this, they will no longer be a Chinese citizen.

If you get married here, it's fine, but beware the long waiting times for immigration documents and you'll have to do the interviews at the consulate to make sure this isn't a scam marriage should you want to try and get them a visa in the future.

Get married here. It's a long day in terms of paper work, but costs 9 yuan.

As well, I had a western wedding too. Open bar for 70 people, big buffet a a nice western style restaurant..... cost me $3,000 USD. And I made more than that back in Hong bao.