oblivious

"Chinese" can mean the written OR the spoken language. It can also be used to describe people who are born of this descent.
$ H( q/ ^( L) y7 L: V/ ]* h& N公仔箱論壇
: b* e  ^+ e  l. N( }, Hi.e. Can you read Chinese? <-- written
) ~3 q3 O- G- ^% I+ _- xDo you speak Chinese? <-- spoken
$ F1 S- e" b4 C" e+ j# _. mAre you Chinese? <-- adjective
" [9 T4 C: ]/ s* C/ w7 n公仔箱論壇4 T0 L2 ~0 h  d% ^/ H0 {% g
Since this series takes place in an era of HK before the late 1990s (before it is officially returned as a part of China), "Chinese" can be loosely used to mean Cantonese, since Mandarin hasn't been established as a common dialect of China yet. On the other hand, Cantonese is the predominant language of the local area. So, I think what 松哥 said is acceptable.