Major Footpath Route 12 / Cheung Po Tsai Traditional Path [????- ]
Checked the electronic map again and the former route 12 starting from west of Tregunter Path and Old Peak Road had been cut off right at the previous Po Shan Road landslide site.
Please find here a photo from street view of the starting point of the path:
I think I have read about this path in old urban folklore with reference to local pirates when I was a kid, naming it as a round the peak route. According to the old map route 12 is approximately somewhere between the 700 & 800 ft contour. Current version of maps would show it more or less around the 200m contour.