How to pronounce 來往 in Cantonese (8 out of 9):

原因係喺商業來往上面
It's because the business is coming up.

Cantonese Sentence Breakdown

原因 jyun4 jan1
reason
hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
hai2
in
商業 soeng1 jip6
business
來往 loi4 wong5
come and go
上面 soeng6 min6
(noun) Up stair; (figurative - old) 1. China