I arrived in China at 11pm and was married the next morning about 9:30AM. Less than 12 hours.
And thanks to my good friend Ed, I was able to collect all of the documents needed, in 1 single day before I left the USA.
When reading Advice here about this subject. Look at where the guy giving it is from. every country has some little BS that makes them just a bit different.
From the US Collect all the doc's give them to the registrar in China, And in a few minutes you will be married. Most Chinese women know exactly what needs to be done.