During their recent work on the apache/arrow repository, Fangzhou Jiang focused on improving the tensor type system in C++. They addressed a bug in the FixedShapeTensorType::MakeArray method, ensuring it now returns a FixedShapeTensorArray rather than a generic ExtensionArray, which prevents misclassification of tensor objects in downstream machine learning pipelines. Their approach included adding comprehensive regression tests to validate scalar type retrieval and tensor conversion roundtrips, enhancing reliability and maintainability. By leveraging their expertise in C++ and software testing, Fangzhou delivered a targeted fix that improved correctness in tensor construction, demonstrating depth in both code quality and validation.