Z. Wu developed core fungible asset and coin event tracking enhancements for the Entropy-Foundation/aptos-core repository, focusing on asset accounting and system observability. Using Rust and smart contract development skills, Z. Wu introduced new event types such as CoinDeposit, CoinWithdraw, FaDeposit, and FaWithdraw, each with type tags to support event-driven asset tracking. The work included updating Cargo.toml and Cargo.lock to integrate derive-getters, improving code ergonomics and safety. These changes addressed project governance and reporting needs, enabling better integration points and auditability. The engineering approach demonstrated a solid understanding of system development, with depth in modular design and maintainability.