Marriage is fine. However, it will be a big problem if you ask the other part to convert to islam.
Even in China, it is hard for inter-religion marriage. My parent have quite a few colleagues who were Hui (Chinese muslim). Some of them are both Hui. There are also some family with only one parent is muslim and the other is not.
In that case, the other partner will abide by the eating tradition of muslim only.
I also have classmates (both in high school and in university) whose family are hui muslim. Some of them abide by the dining tradition while some of them just do not care and indeed eat everything. However, none of them show any signs of muslim from what they wear or do (e.g. they indeed do NOT wear any clothes showing religious affiliation or do any of those pray things or have any koran books with them). I asked them why they were listed as Hui and they just said it was good for extra bonus for college exam, or any exam on his/her way to college.
For hui children, it depends what you ask for the other partner in the future when he/she seeks marriage. I heard it is a lot harder if he/she only asks for a tradition Hui muslim as partner.
However, since all of these observations are from the capital and east coastal areas, it only reflect what happen in major cities. I suppose in western regions of China, it could be more conservative.
We should start going to china and start marrying and vice versa. Chines girls are very beautiful, I know some work in my office..............