The Chinese languages constitute an immense “family’ of languages ~ whatever the “official” language is in Big China is irrelevant. It’s a vanity of the Communist party that they provide leadership in all matters to the Chinese speaking peoples worldwide ~ but that’s just pure CR*P.
I was pointing out that when you are discussing tones, you can't refer to the "Chinese" language. You have to refer to the specific dialect. Since Mandarin is the official language in China ( whether you like it or not ) - as well as Taiwan - when most people refer to Chinese, they are really talking about Mandarin.