Yes it is.
I don't make the rules up.
Chineseman isn't derogatory. That would equate with Englishman, Scotsman Welshman, Irishman.
A Chinaman is a left-arm slow delivery as bowled by E.E. Achong - a West Indian bowler of chinese descent.
(
F5 F5 F5 Can't be arsed.,
Fri 15 Dec 2006, 16:59,
archived)