How long is a chinaman?

it is a statement, actually, kind of. How long would be the name of a person in this case. The real statement would be, "How Long is a Chinaman."

My father's response was always, "So Long is his sister."

Hate to disagree with your father but since in chinese the family name comes first, How Soon is the name of his close relative [ my father always said it was his son]