How to get from Guangzhou to Houston (Texas)?

You can get a visit visa for visiting relatives, otherwise you have to get a tourist visa.

Do it well before the Chinese New Year, and you can go during the Chinese New Year.

You can choose to fly directly from Guangzhou to Los Angeles and then buy a ticket to fly to Houston (there is no direct flight from Guangzhou).

Or direct flights to Hong Kong, the price is not much different. See if you like it personally.