There is an interesting relatively fast hike from HKUST North Gate to Nam Wai via the beach at Pak Shui Wun. It’s a bit hard to explain, even with a map, so it is best if you find someone already familiar with the hike and go with them first. There are some lovely views of HKUST campus from the beach, nice vegetation and foliage, and views of the sea. Here is the full HKUST North Gate to Nam Wai via Pak Shui Wun gallery at my website.