"Monk of Zen". Legend has it that the monk had travelled over water in a cup and finally reached the Castle Peak. He established a monastery on the hill, which became the present-day Tsing Shan Monastery. Early records have indicated that the peak was an island once named Tuen Mun Island (). Its former channel with Kau Keng Shan of an important sea route in South China. Defence structures were built on both hills. See also Castle Peak Road Kau Keng Shan Three Sharp Peaks of Hong Kong List of mountains, peaks and hills in Hong Kong References Mountains, peaks and hills of Hong Kong