Shiqing worked on the robolectric/robolectric repository, delivering ShadowOS lseek support with file descriptor offset tracking to enhance I/O semantics in JVM-based tests. By designing a per-file-descriptor offset map and implementing SEEK_SET and SEEK_CUR handling, Shiqing enabled more accurate file position management during test execution. The solution maintained compatibility by safely falling back to the original lseek behavior for unsupported whence values. This work, using Java and Android development skills, improved test reliability and broadened coverage for I/O-heavy scenarios in the Robolectric test suite, demonstrating depth in data structure design and careful integration with existing ShadowOs logic.