oblivious

"Chinese" can mean the written OR the spoken language. It can also be used to describe people who are born of this descent.
( ?6 b0 R0 {. t6 [公仔箱論壇0 M* `' F) e' [0 j' z" [  Q; h
i.e. Can you read Chinese? <-- written5.39.217.77$ E4 y9 ^8 C2 t# O8 {& L9 O% H" T
Do you speak Chinese? <-- spoken
$ S7 |0 y: J- l& ftvb now,tvbnow,bttvbAre you Chinese? <-- adjective9 m. Z. Q+ A, z  z
tvb now,tvbnow,bttvb! V5 F$ {& }: }; p  y4 q8 ?, ^5 h
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.