From Fragmented Development to Three-Dimensional and Coordinated Development - Research on Renewal Strategies of Existing Underground Commercial Space in Harbin

In Harbin, a network of underground commercial spaces has developed, occupying space originally created as civil defense shelters. With the gradual extension of the local metro rail system, the existing underground commercial space is no longer an isolated regional development, but is representative of the “three-dimensional city” and coordinated development taking place in many Chinese cities. Based on the analysis of the unique development process of underground space in Harbin, this paper summarizes three characteristics of its early model of “fragmented development” of underground space. After conducting field research and a survey, the researchers analyzed 472 questionnaires related to the development trend, and propose multi-level synergistic elements for the renewal and development of underground commercial space. The paper concludes by discussing the trend of “three-dimensional and collaborative development,” suitable for the development needs of the new era, and the corresponding development strategies for the renewal of underground space.