the differences are as following:and I only give 3 exmaples:
First: from greeting side: When Chinese first meet the others, they will shake hands with them, but for Americans, usually they just nod their heads and say hello, if they meet their friends, they will kiss each other.
Second: from eating habit: most Chinese people like salted food, and use chopsticks, but American people like sweet food and use knife and fork.
Third: from the education side: Chinese parents will support their kids from the primary school to university; and some till the kids work and marry; but American people only support their kids till high school. And about the unversity fee, they will tell their kids to pay by thermselves through spare-time working.
From the above, we know that there are many different customs between China and US.