The phonology differs. Vocabulary differs. Grammar differs. Speaking Cantonese and Mandarin natively, I have no idea what Hokkien or Sichuan people say, whether or not you write it down.
This is especially apparent when speaking to less educated people with less exposure to the standardised, official Chinese language, which is what people do actually write down when intending for a broader audience, of course. Diglossia is real.
This is especially apparent when speaking to less educated people with less exposure to the standardised, official Chinese language, which is what people do actually write down when intending for a broader audience, of course. Diglossia is real.