During February 2025, Zihao Diao focused on backend development for the JunkFood02/FreshRSS repository, addressing a critical issue related to feed ordering by priority. He identified and fixed a bug in the PHP codebase that previously omitted the 'priority' field when processing new feeds, which had led to inconsistent feed sorting and potential user confusion. By isolating the priority handling logic and validating the ordering behavior after the fix, Zihao improved data integrity and reliability within the application. His targeted debugging and attention to business value helped reduce support overhead and ensured a more consistent user experience without introducing new features.