📖 Meaning
Originally referred to throwing a stone before sneaking into a place at night to check whether anyone was around or alert. It is now used metaphorically to describe probing or testing a situation cautiously before taking further action. The idiom emphasizes gathering information through a small, low-risk move before committing.
📜 Origin Story
This idiom has no single definitive literary source but derives from the practical tactics of thieves, scouts, and night infiltrators in ancient China. Before entering an unfamiliar or dark compound, they would toss a stone inside and listen for any reaction—barking dogs, shouted challenges, or movement—that might reveal whether the area was guarded. Over centuries this literal precaution became a widely used metaphor for cautious probing and tentative exploration in negotiations, diplomacy, and everyday decision-making.
💡 Example Usage
谈判前他先提了个小问题，算是投石问路。
Before the negotiation, he raised a minor question as a way of testing the waters.
🏷️ Category
➕ Similar Idioms
➖ Opposite Idioms
🔤 Quick Facts
- Chinese: 投石问路
- Pinyin: tóu shí wèn lù
- Literal Translation: throw, stone, ask, way
- Category: Method
- Characters: 4