Tung Ping Chau is situated in the furthest northeast corner of Hong Kong waters, only 3 kilometres from Guangdong Province. As well as being a most beautiful island, it is geologically unique, being the only area of Hong Kong entirely formed from sedimentary rock, which was laid down about 200 million years ago. The dramatic exposed cliffs and foreshore of Tung Ping Chau provide clear evidence of climatic and environmental conditions over 60 million years ago. There are also to be seen the effects of recent coastal erosion and other distinctive landforms around the island. The island has been left as a paradise for wildlife and visitors, and has been declared a Site of Special Scientific Interest. David Brian is Head of Social Sciences at Chinese International School and is a wellknown expert on Tung Peng Chau.