What is the difference between Cantonese, Szechuan, Hunan, and Shanghai style Chinese food?

Cantonese food is like Samwoo restaurant, they have a lot seafood, soup with herbs and dimsun (shrimp usually)

Szchuan and Hunan food is real spicy, especially the real Chinese food, very spicy...

Shanghai is sort of sweet and mild, focuses on sauteed or pan fried dishes. I like it a lot.

1

this is probably a dumb answer, but the difference in the style of chinese food is based on the region the style it is supposed to represent. For instance Cantonese food represents chinese food near hong kong, while shanghai food represent chinese food in shanghai which is a different geographical area of china. As far as the taste and spices used in each region I'm not sure what the difference is.

They are from different regions of a very vast Country.

It's like the difference between English food, Swedish food, Turkish food and Iranian food; simply because these "provinces" of China are approximately that far away from each other!?

Spices and preparation

The diff. is the kind of insects & bugs they use for flavoring