This is a tiny little village in Nam Sang Wei (Yuen Long); it's where the exchange of Ray Lui for Louis Koo and Fan Bing-Bing takes place. Now, there isn't Street View coverage and I can't find an image which has both jetties on it, but this Panoramio image shows the view across the water; the panorama is unmistakable and you can match up quite a few of the trees etc (thanks to samshum).