During February 2026, 1198857088@qq.com contributed to the OI-wiki/OI-wiki repository by focusing on documentation quality in the mathematics and number theory sections. They identified and corrected a critical typo in the factorial formula related to prime modulus calculations, ensuring the documentation accurately reflected the intended mathematical expression. This update, implemented using Markdown and leveraging their mathematics expertise, improved the reliability of the reference material and reduced the risk of misinterpretation for future users. While no new features were developed during this period, their attention to detail enhanced the clarity and correctness of technical guidance for the project’s user base.