What you said is too extensive.

According to several places I have been to,

For example, there is a street called Gooseberry Tan (at the bus stop) on Xicha Road in Baiyun District. The snacks there are not very famous, but you can try it if you go there. That soup bean sprouts, iron frog and steamed egg are very authentic! Or the dumplings in the Northeast Hotel and all kinds of Northeast dishes!

It's still on the street of Guangzhou Railway Station, under the overpass. Unfortunately, I can't remember the address and shop name of the furniture. There is a seafood restaurant, which is authentic Cantonese food, and the soup cooked there is memorable.

Among them, Guangdong and Guangzhou have their own cuisines. I suggest you go there, and you'd better find a local friend to show you around, so you can naturally find the natural cuisine.

and you can also buy some newspapers, some of which have large pages to introduce local food. When you go to a gourmet shop, just let the receptionist introduce their specialty dishes!