Xia Dong developed a Helix-based Secondary Vertex Factory for the EICrecon repository, expanding its reconstruction capabilities by introducing a new SecondaryVerticesHelix factory within the reco plugin. Using C++ and leveraging algorithm development and data analysis skills, Xia implemented a system that stores vertex data in PODIO (edm4eic:Vertex), enabling more precise secondary vertex reconstruction for physics analyses. The work included comprehensive test coverage and updated documentation to ensure reliability and ease of adoption by collaborators. During this period, Xia focused on feature delivery and end-to-end validation, demonstrating depth in software engineering while addressing a specific need in the EICrecon framework.