Boarding Gate - Asia Argento (2007) - Nelson Street, Mongkok

I haven't quite sussed out where they filmed the industrial building that Sandra flees from (somewhere in Kwun Tong I think) - but she crashes out of a side alleyway (lots of those in Hong Kong) and into Nelson Street in Mongkok. We know exactly which alleyway because we can just make out the "Hon Wing Book Company" opposite. Then as she turns to her right we can see an overhead banner for Ladies Market - situated at the junction with Tung Choi Street in front.

The similar angle from Streetview is below. Note the "Clarks" sign and the red and blue sign in the background (obscured in the screencap).