The last half century has been the golden age of Chinese archaeology. New discoveries came one after another, which have riveted world attention to the splendid and exuberant history of the Chinese nation. When Professor Te-kun Cheng founded the Centre for Chinese Archaeology and Art in 1978, his goal was to advance the study of Chinese archaeology within this university and those of its counterparts all over the world.     The Centre has established a laboratory of field archaeology and archaeological team since 1987. During the past two decades, the Centre has investigated a total of 43 sites in Hong Kong and Macau, and conducted excavations at Tung Wan, Tai Wan, Pak Mong, Pa Tau Kwu, Hac Sa and other sites. Joint archaeological excavations have also been carried out at Trang Kenh and Xom Ren sites in Vietnam and Shanxi Province in China. Besides excavations, members of our centre also undertake works of research, teaching, publication and exhibitions. We have already held four international conferences and exhibitions respectively.     To continue the prosperous trend of Hong Kong, we need to cherish Hong Kong and learn about its past. We need to reconstruct the history of Hong Kong by excavating archaeological data in the most stringent scientific manner. Indeed, all these seemingly negligible sites, unsightly lithic and pottery discoveries have provided immense significance and value in restoring the history of Hong Kong.