Miaobuao enhanced the run-llama/llama_index repository by delivering core improvements to vector store query functionality. Using Python and SQL, Miaobuao implemented a less-than filter operator in the SQL operator mapper, enabling more expressive queries for downstream applications. They addressed reliability issues in LanceDB integration by refining metadata filtering logic and correcting SQL generation for list values, which improved data retrieval accuracy. Additionally, Miaobuao strengthened backend stability by introducing robust handling of None values in query results, preventing potential crashes. The work demonstrated a solid grasp of backend development and database management, focusing on practical solutions to real-world data challenges.