oblivious

"Chinese" can mean the written OR the spoken language. It can also be used to describe people who are born of this descent.
1 B6 o4 K" |  Z4 \2 K+ u5 i公仔箱論壇5.39.217.76* R/ Q- [, I: [& l8 z# s$ N
i.e. Can you read Chinese? <-- writtentvb now,tvbnow,bttvb* h( p2 o: J; C9 f3 {
Do you speak Chinese? <-- spokentvb now,tvbnow,bttvb$ Y6 C! e' N$ a0 E! s% y
Are you Chinese? <-- adjective+ A% @6 a! ^4 f& g1 m
TVBNOW 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。9 |/ `. r6 ?) D- J7 i, j
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.