‘蓝图’ literally means ‘blue map’ — a compound noun where 蓝 (lán) means ‘blue’ and 图 (tú) means ‘map,’ ‘plan,’ or ‘diagram.’ Historically, it refers to the traditional blue-printing process used in architecture and engineering, where white lines appear on a blue background. Today, it’s used metaphorically to mean a detailed, forward-looking plan or vision for development — especially for cities, organizations, policies, or large-scale projects.

The term carries a formal, aspirational tone and is common in official documents, government announcements, corporate strategy, and academic discussions. While it can refer to literal architectural plans, its figurative use dominates modern speech and writing. It implies structure, intentionality, and long-term thinking — not just an idea, but a carefully designed framework for action.