I photographed the hallways from the 1st to the 23rd floor of the Hangang Building in Wuhan. Built in 1992 by Hong Kong real estate businessman Tse Chun Ming, it was the first real estate project in Wuhan. It is worth noting that at that time, Hong Kong had not yet returned to China. This work aims to connect the Hangang Building's corridors to its post-colonial history, exploring its special significance and historical context before and after China's handover. As a unique building in Wuhan, the Hangang Building carries rich historical connotations and cultural memories. Through photography, viewers are able to see the details and unique atmosphere of each floor of the building, perceive the diversity of the building's interior, experience the intertwining and impact of history and reality, as well as the architectural design and cultural symbols of the Hong Kong Real Estate Company, while mapping the historical intersection between Hong Kong and Mainland China. These hallways, as part of the buildings, bear witness to the great changes in Chinese society before and after the handover. The involvement of Hong Kong real estate developers further highlights the historical connection between Hong Kong and Mainland China at that time. Through the lens of post-colonialism, each floor of the building witnesses the dramatic changes in Chinese society and urban space before and after the handover. The work will lead the audience to travel back in time, to feel the veins of history and to reflect on the cultural identity and values in the context of post-colonialism.