Besides historical documents and artifacts, buildings are also tangible evidence of history. Heritage conservation has aroused concerns in recent years, and at the same time it has stirred controversy of whether “conservation and economic development are opposing forces”. In the special episode of the third season of “Hong Kong History Series”, Dr. LEE Ho-yin, director of the Architectural Conservation Programmes of the Department of Architecture in the University of Hong Kong, will be invited to explain how the conservation of historical buildings improves the quality of people and brings economic benefits to society. The product of a painstaking process, this season of “Hong Kong History Series” explores the past from the perspective of public livelihood. Its topics range from the early press industry and shipping to the development of domestic healthcare, legal system, public transport, housing, relationship between Chinese merchants and regional development, all the way up to the defence of Hong Kong during WWII. As always, the production crew has visited the advisory panel formed by experts and scholars of history with different specialties, including Dr. TING Sun-pao, Joseph; Dr. LAU Chi-pang, J.P.; Professor Paul LEE; Mr. KO Tim-keung, Tim; etc. Their invaluable comments not only enrich the content of each episode of the series, but also provide interpretation on historical perspectives unknown to most. The video image can be a powerful media of expression. To this end, the production crew chose to film in Shanghai and Foshan; there, they used local studios installed with settings with a striking resemblance to nostalgic Hong Kong street scenes. They used the camera lens like a time machine to travel back to the old days of Hong Kong and allow the audience to experience historical occasions such as the apprehension of Ho Chi-minh, the father of Vietnam, in Kowloon City; the deplorable living conditions of the Chinese people when the city of Hong Kong