Yixuan Chen developed Xuantie CPU support for the rust-lang/gcc repository, expanding GCC’s backend to target the xt-c908, xt-c910, and xt-c920 RISC-V CPU families. The work involved adding new core definitions, tuning data, and comprehensive documentation, as well as implementing and validating the -mcpu option for these processors. Using C and leveraging expertise in compiler development and embedded systems, Yixuan ensured that the new targets integrated smoothly with existing GCC infrastructure. This feature enables optimized code generation for Xuantie devices, facilitating broader adoption of RISC-V in embedded applications and demonstrating depth in both architecture-specific backend engineering and test automation.