US is more diversity than China definitely. At least in China, most people speak Mandarin, eat noodle and rice. But in US, how many people speak English? Eat Hamburg?
>Eat Noodle and Rice.
The cuisine of China is actually very varied. Rice is more common in the Southern and Middle parts of China compared to noodles which are found mostly in the Northern Parts.
You could not find a Dim Sum place in Shanghai compared to Southern cities because Dim Sum is more of a Southern tradition. While the cuisines of Shanghai are completely different than ones found in Xian, Xinjiang, and Hubei.
[1]https://en.wikipedia.org/wiki/Languages_of_China [2]https://en.wikipedia.org/wiki/Languages_of_the_United_States