During November 2024, Tuziemon focused on backend reliability within the pingcap/tidb repository, addressing a critical bug in the Truncate Function. By ensuring the unsigned flag was correctly propagated from input to output, Tuziemon improved the correctness of numeric operations involving unsigned integers. This work, implemented in Go and SQL, reduced the risk of silent errors in truncation paths and enhanced data integrity for unsigned arithmetic. The solution required a deep understanding of database internals and expression evaluation, demonstrating careful attention to edge cases. Although no new features were shipped, the contribution strengthened the stability of the codebase’s numeric handling.