What is Li Hua going to the United States for?

M: Hello, Li Hua. I hear you are going to the United States.
W: Yes, I’m going with my grandma. We’re going to see my parents in New Jersey.
M: When are you leaving, then? And how long will you be there?
W: This Friday evening. And I’ll be there for six months.
M: Six months! Do go and see my grandparents in New York, please.
W: Of course, I will. How can I travel?
M: Most people travel by car. The roads are very good.
W: But I don’t have a car and I can’t drive. Can’t I travel by train?
M: Yes, you can. The train is expensive in the States, but it’s fast.
W: Then I can save some time. Thank you very much. Well, I must be off now, see you when I get back.
M: Good luck and have a good trip.