This report by P.H. Hase provides historical background including the history of the Eastern coast of Hong Kong around what is now Sai Kung - 西貢Town. Beginning with the pearl trade of the Sung -宋 and Yuan - 元 Dynasties through more recent times the paper discusses the relative importance of Ho Chung - 蠔涌 village and the origins of the Che Kung - 車公 Temple situated there.
Download "The Historical Heritage of Ho Chung, Pak Kong, and Sha Kok Mei, Sai Kung" by P.H. Hass: