What’s in a name?

Raised in Scotland, travelled and lived in SE Asia for a considerable number of years, I’ve encountered many many pronunciations / inflections / intonations etc. when pronouncing a word for Tea / Cha .. Throughout Mainland China you hear a potpourri of pronunciations for “Cha” 茶 .. from a soft “sha” to a crisp “Ta”. Mostly encountered when being asked to “Drink Tea”  He Cha 喝茶. The pronunciation of; Drink he 喝 also has regional variations. Most common sound like the English “her” (The possessive form of she) as in; Her book.