Haimen Shishan Square is the most important urban renewal project in Haimen District, in the central core of this contrasting old city, through the design concept of "Reduce the building proportion & Increase site planning", an open "street life" building place with rich spatial levels and strong commercial vitality is constructed in the crowded, cluttered old city center. A sports park and runway were built on the podium roof. By means of sports and leisure + culture and art + creative business, natural interaction rooted in real life is created to explore the model of old city reconstruction