Sustainable Development Strategies for Culture–Tourism Integration in the Historic District of Tianzifang, Shanghai

This study focuses on tourist-oriented urban historic districts. In recent years, many such districts have experienced commercial intensification and homogenization, placing pressure on sustainable development. The prior work is largely descriptive and offers limited mechanism-level guidance for governance. In response, this study employs Tianzifang as an empirical case and proposes an online-review-driven mechanism-identification framework. Drawing on 3005 online reviews, a quantitative–qualitative mixed approach was adopted: word-frequency and semantic-network analyses of the full corpus mapped topics and their relational structure; guided by these structures, grounded-theory coding was conducted on a negative-review subsample (n = 602); the results indicate a double-helix interaction between culture–commerce and expectation–reality, associated with lower perceived authenticity, affective disconnect, stronger negative word-of-mouth, and perceived declines in attractiveness. The main contributions are: a mechanism identification framework with a replicable quantitative–qualitative integration workflow; the construction of a double-helix mechanism coupling culture–commerce and expectation–reality; and, on this basis, a governance strategy framework to support fine-grained management and the sustainable renewal of urban historic districts.