I'd imagine that the Chinese cuisine in Busksnort, TN is nothing like the food in China.
But it really grates me when people leave the US and say that they can't get real "insert name of country" food in the States.
To some degree, this is true, but far from an absolute. As BT pointed out, "authentic" Chinese cuisine is available in the Bay Area, in no small part due to the the fact it has a huge Asian imigrant population.
Also, NYC has many "authentic" and unique foods. These were pretty unique to me when I first left Syracuse and went to NYC Chinatown.
Perhaps because Chinese cuisine in Bucksnort is not prepared the same way as in China, it may surprise you to know that in high asain immigrant populated areas, chou dofu and the like is readily available.
Rest assured, you can get all the international food you desire if you know where to go to get what you're looking for.
As BT said, "this IS the US after all."
a co-worker of mine is married to a woman from Japan. (Her parents still live there) When looking for Japanese and other asian foods, I always ask him first. From his experiences, there are very few foods he CAN'T get in the DC area, including the some of the many different types of vegetables
which aren't even easily found in Japan!
The only things he finds that is impossible to get is some of the strange prepackaged snacks in Japan. I once had some sort of gummy candy that was a combo of licorice, orange and salt. Not my favorite, but some of the cookie type snacks were good.
Overall, I think you'll be ok when returning Stateside and needing a Chinese food fix.
Have a good trip and enjoy your time in China.
I look forward to your food pics.