Hi, I've lived in China.
I think that in China, "dating" in China is more serious than it is in America.
In the US, dating someone doesn't mean that you want to marry them. Dating is very casual and it is possible to date 1-3 people at any time. It's very common to date several people while you decide which one, if any, you want to have a serious relationship with. Please note that serious relationship isn't the same as a relationship that will result in getting married.
In the US, it's common for people who have been dating to talk about becoming exclusive (=not dating other people) after 3-6 months of dating. Before a couple has 'the talk' (a discussion about becoming exclusive), they assume that the other person has been dating 1-2 other people. After a couple has 'the talk' they will either agree or disagree to date other people.