Chris Ding enhanced the CI/CD pipeline for the tier4/scenario_simulator_v2 repository by streamlining build automation and improving code coverage reporting. Using Shell and YAML, Chris reworked GitHub Actions workflows to integrate SonarCloud coverage metrics, enabling more reliable and actionable feedback during development. The work included removing unnecessary dependencies, such as the build-wrapper-linux-x86.zip, and cleaning up workflow triggers and debug statements to reduce CI noise and maintenance overhead. These changes improved build maintainability and reduced complexity, resulting in faster, more stable releases. Chris’s contributions focused on practical automation and workflow hygiene, demonstrating depth in CI/CD and code quality tooling.