oblivious

"Chinese" can mean the written OR the spoken language. It can also be used to describe people who are born of this descent.
( q! L6 l% d6 `tvb now,tvbnow,bttvb/ G" K' L9 r% _6 I
i.e. Can you read Chinese? <-- writtentvb now,tvbnow,bttvb0 l- k) A8 q5 e
Do you speak Chinese? <-- spokentvb now,tvbnow,bttvb4 ~; Q5 }; d8 A# J/ U
Are you Chinese? <-- adjective
& V/ q: W) V& U' D' H# T( N  qtvb now,tvbnow,bttvbTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。4 e) n# K0 @3 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.