‘Xiōng yǒu chéng zhú’ literally means ‘the chest holds a complete bamboo’—a vivid image drawn from traditional Chinese ink painting. The phrase originates from the Song dynasty painter Wen Tong, who painted bamboo so skillfully because he had mentally visualized every detail of bamboo growth before picking up his brush. Thus, the idiom conveys having a clear, fully formed plan or solution in mind before taking action.

It emphasizes mental preparation and confidence rooted in thorough understanding—not just vague intention. It’s commonly used to describe someone who approaches a task (e.g., giving a speech, leading a project, or solving a problem) with calm assurance because they’ve already worked everything out internally. Though it contains ‘bamboo’ (a plant), it functions as an abstract noun describing a state of readiness, not a physical object.