The cache container is a 3-4 inches plastic bottle, only log sheet inside, please bring your own writing tools. This cache is hiding inside the gap between the rocks. The spoiler picture could help you much! Please be careful when searching the cache.
Some of Hong Kong's most dramatic scenery is to be found within the boundaries of the Ma On Shan Country Park (Chinese: 馬鞍山郊野公園 . The park was established on April 27, 1979. Located in the central neck of the Sai Kung peninsula in the eastern New Territories, this covers 28.8 km2. This park links the Sai Kung Country Park and Lion Rock Country Park to form an extensive recreation area on the Ma On Shan.
Iron mining has for long been carried out at Ma On Shan. The lease of the mine expired in 1981 and activity has meanwhile diminished as the quality of the ore has declined. Concealed mine shafts and man-made scree slopes are potentially dangerous and the area around the mine - excluded from the park, although surrounded by it - should be explored with care.
The above information from Wikipedia.