How to pronounce 初步 in Cantonese (6 out of 7):

因此警方初步推斷
So the police came to a preliminary conclusion.

Cantonese Sentence Breakdown

因此 jan1 ci2
therefore
警方 jing3 fong1
police
初步 co1 bou6
at first step; firstly
推斷 teoi1 dyun3
infer