Colleagues of Hong Kong Geological Survey sometimes travel up and down hills to conduct geological survey in remote areas of Hong Kong.

Colleagues of Hong Kong Geological Survey sometimes travel up and down hills to conduct geological survey in remote areas of Hong Kong.

Colleagues of Hong Kong Geological Survey sometimes travel up and down hills to conduct geological survey in remote areas of Hong Kong.

Colleagues of Hong Kong Geological Survey sometimes travel up and down hills to conduct geological survey in remote areas of Hong Kong.