How much is the air ticket to America? One way? What if it is a round trip?

It depends on where you go, the time, whether it is a year or three months to go back and forth, and so on.

Generally speaking, if you book in advance, the one-way or round trip may be around five or six thousand. According to the local income level, food in America is not expensive. Hamburg costs 4-5 dollars, and consumer goods are very cheap. The bigger the city, the cheaper it is, especially the supermarkets in China.

Cultural background is not necessary, there is not much difference. In addition, you will naturally understand when you get to the environment. But it depends on what you do. If you are in a meeting, you'd better know about social etiquette, such as talking to people, and never ask a lady's age.