Xin Chen worked on the LuisaGroup/LuisaCompute repository, focusing on enhancing the reliability of the intermediate representation (IR) subsystem. During this period, Xin identified and resolved a bug in the IR’s doubly linked list insertion logic, which previously risked list corruption and downstream failures in compilation passes. By carefully updating the predecessor’s next pointer and the successor’s previous pointer, Xin restored list integrity and improved the stability of IR processing. This work, grounded in C++ and leveraging strong data structures and low-level programming skills, demonstrated a disciplined approach to debugging and maintenance, reducing future risk and supporting long-term codebase reliability.