During December 2024, Fan focused on backend development for the debezium/debezium repository, addressing schema integrity during snapshot processing. He implemented a targeted fix that dynamically generates the SNAPSHOT_RECORD_SCHEMA enum values from the SnapshotRecord enum, ensuring the schema remains consistent with runtime values. By aligning the default value with the lowercase name of the FALSE enum constant, Fan reduced the risk of schema drift and potential runtime errors in downstream systems. His work, primarily in Java, demonstrated careful attention to enum handling and schema management, resulting in a more maintainable codebase and improved data integrity during connector snapshot operations.