If you ask Modern Standard Mandarin (MSM — Guóyǔ 國語 / Pǔtōnghuà 普通话) speakers how many tones there are in their language, most of them will tell you without much hesitation that there are four tones (1st, 2nd, 3rd, 4th) plus a neutral tone.
Chances are, however, if you ask a Cantonese speaker how many tones there are in their language, they will not give you a clear answer, or if they do, it will differ from what other Cantonese speakers claim. That has always been my experience over the years, but I just did a little survey to reconfirm my earlier impressions. The results are rather more amazing than I expected them to be:
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