Fortune cookies are actually not from China. They are a Japanese invention, commercialized by Chinese immigrants.
Nobody in China knew about General Tao's Chicken until recently. And General Tao didn't even think about it.
Sweet and Sour pork has strong southern US influences.
I have a good friend who is Chinese Mandarin and he told me the same thing. He said the Chinese food we eat here is crap and he never orders from the menu. I really don't care that it's crap, it tastes good to me!