I'm going to immigrate to America. I wonder what the journey from Fuzhou to America is like. Do I need to change trains anywhere? And what should be paid attention to in this process?

From where to where, the United States is so big, so many places, where are you going? Generally speaking, it depends on which airline you take.

As far as I know, in my own experience, I went through the customs from Beijing and Shanghai, and most of them were flights from the United States and China, from Fujian to Shanghai or Beijing. You should know how to get there. Shanghai or Beijing flies to the United States, usually big cities, such as SF, LA, Detroit, Chicago, NYC and so on. After arriving in these cities, you have to enter the customs, get your luggage, and then transfer to your destination.

It's that simple. Your question is too general.

====================================

It is suggested to fly directly from Shanghai or Beijing to new york or Chicago.

You can book a flight from a travel agency, or you can book it on the website if you have an international credit card.