## 5 Conclusions  
This study employs data mining techniques to extract high-frequency keywords and conduct topic and content analysis on online reviews sourced from Diamping. The primary objective is to elucidate visitor perspectives and attitudes by tapping into the abundant information in these comments. This study sheds light on visitor preferences, constraints, and the transformative impact of ecological restoration projects on urban river corridors. Firstly, while spring and summer attract more visitors, winter holds an appreciable attitude despite less visitation. Visitors prefer weekends, evenings, and mornings, and the visiting time is closely linked to weather conditions. Secondly, the Hutuo River Corridor receives widespread acclaim among visitors, who express positive views on its natural environment, planning and design, convenient facilities, and transportation conditions. Notably, the successful implementation of the Hutuo River ecological restoration project has transformed the area into an ideal place for citizens' leisure and fitness activities. Thirdly, accessibility is a crucial factor influencing visitor usage of the Hutuo River Corridor. Visitors generally perceive transportation and parking convenience positively, although insufficient parking resources may arise during peak seasons. Improving the accessibility of public transportation, especially during peak hours, can facilitate more citizens' reaching and enjoying the area conveniently. Additionally, constraint factors are mentioned in user comments, such as staircase width, limited space at the tower top, and various weather and seasonal considerations. In conclusion, analyzing social media data offers profound insights into optimizing the urban river corridor. Beyond the specific case, the findings suggest broader implications for urban recreational spaces. It contributes to understanding visitor behavior, preferences, and the importance of accessibility in enhancing urban recreational spaces' usability. However,several questions still need to be answered, such as the long-term sustainability of ecological restoration projects and the potential impacts of climate change on visitor patterns. Future research could explore these aspects further. Furthermore, this study underscores the significance of integrating visitor feedback into urban planning and management processes to enhance public space accessibility and visitor experiences. Recommendations for blue-green infrastructure practices, management strategies, and sustainable development initiatives can be drawn from these insights, contributing to advancing the field of urban blue-green space management and design. The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app14104086/s1](https://www.mdpi.com/article/10.3390/app14104086/s1)]([https://www.mdpi.com/article/10.3390/app14104086/s1](https://www.mdpi.com/article/10.3390/app14104086/s1)), Table S1. High-frequency feature words in user reviews of the Hutuo River Corridor in Shijiazhuang (urban section): top 100 rankings. Table S2. Frequency list of LDA feature words for each theme (top 30). Table S3. LDA theme description and comment examples. Conceptualization and methodology, L.S., S.M. and C.D. ; writing--original draft preparation, L.S. ; formal analysis, investigation, and data curation, L.S. ; validation, S.M., M.J.M.Y. and C.D. ; writing--review and editing, S.M., M.J.M.Y. and C.D. ; supervision, S.M. and M.J.M.Y. All authors have read and agreed to the published version of the manuscript. This research received no external funding. The study was conducted in accordance with the Declaration of Helsinki, and approved by the Ethics Committee for Research involving Human Subjects of University Putra Malaysia (protocol code JKEUPM-2023-1338). The original contributions presented in the study are included in the article/Supplementary Material, further inquiries can be directed to the corresponding author. We would like to thank all the literature and previous research cited in this study.