GDL direction slab, Shatin Pass area [????- ]

Year completed is: Accurate
Condition at last visit: Top face partially damaged, some directions not clear
Date of last visit:
Ref: ROB-01032
Other:

Text on slab:

Bn HQ
PB 21? 301 302 L ?3 61 63 to 66
PB 214 L ? Crown Pt OP