During April 2025, Cong Zhou focused on backend development for the toeverything/AFFiNE repository, addressing reliability issues in server startup. He engineered a new environment initialization process in Node.js using TypeScript, introducing a createGlobalEnv function that loads the .env file once and establishes a global environment object. This refactoring eliminated race conditions and redundant environment variable loads, ensuring consistent and reliable access during server initialization. By restructuring the startup flow to read environment variables in a single pass, Cong Zhou improved deployment stability across environments. His work demonstrated a thoughtful approach to concurrency and configuration management in backend systems.