The credits say 'Ching' but I don't remember her. Which character was she?

If I remember right, she played the girl in police computer center, who helped Karen Mok to track Hsu Chi and Vicky Zhao.

Ah, thanks for the clue. I must have blinked or, more likely, too busy toggling back and forth between the audio tracks trying to get the 'right' voices .
I will go back and look again.