During March 2026, Luzhian contributed to the OI-wiki/OI-wiki repository by improving the accuracy of graph theory documentation, specifically focusing on heavy-light decomposition (HLD). Luzhian addressed a bug by clarifying the definition of a heavy chain’s starting node, ensuring that its relationship with light child nodes was precisely described. This change reduced confusion for readers and supported correct implementation by future contributors. Luzhian’s work demonstrated careful attention to detail in Markdown documentation and applied knowledge of graph theory concepts. The update was delivered through a well-documented commit, reflecting disciplined version control and a thoughtful approach to technical communication.