RAF Ping Shan radar facility [c.1950-c.1957]
The RAF had a radar site here in the 1950s.
I've just put the marker roughly where Ping Shan is - if you know where the radar site was located please leave a comment below and I'll update the marker.
I'm also interested to know the years the site was in use. (Current dates are our best guess based on comments below)
Soon after WW2 there was a plan to build a new airfield here (see http://gwulo.com/node/13265). I'm not sure if the Radar Station was built on part of the old airfield site or not, though it seems likely.