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/ u! L' p4 Jtvb now,tvbnow,bttvb5.39.217.77% J& N. S) n6 ~# s$ I0 L0 g' |* ?
i.e. Can you read Chinese? <-- written
3 R  ^( c) F+ |% B  L5 e: Z$ TDo you speak Chinese? <-- spoken
+ ]/ w- U: N6 C" tAre you Chinese? <-- adjective
8 J1 |/ B0 D, Z) H9 k0 L" |5 X3 vtvb now,tvbnow,bttvb5.39.217.77# }* \5 |2 n7 W# }- a& `0 ^* V
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.