Practical guide
一石二鸟 (yī shí èr niǎo): Meaning, 一石两鸟 and Examples
一石二鸟 / 一石二鳥 describes one action producing two effects. 一石两鸟 / 一石兩鳥 is a recorded alternative. Learn the two readings, original Chinese examples, a one-action/two-results check and the difference from 两全其美.
One action, two effects
一石二鸟 is simplified; 一石二鳥 is traditional. The recorded dictionary reading is yī shí èr niǎo, with first, second, fourth and third tones. The literal image is one stone and two birds. The figurative point is accomplishing two things through one action. [1]
“Achieve two aims at once” is an explanatory translation. It directs attention to the relationship between the action and the results. Two unrelated successes occurring on the same day do not by themselves supply that relationship.
一石两鸟 belongs in the same explanation
The same dictionary records 一石兩鳥, simplified 一石两鸟, with the reading yī shí liǎng niǎo and the same one-action/two-effects meaning. [2] 二 is read èr; 两/兩 is read liǎng. Keep the spelling and reading paired.
These forms answer the same basic usage question. Their two entries do not establish two different strategies, two levels of success or a ranking of how frequently people use each form. Use the spelling that fits your text, while keeping its corresponding reading.
Two original sentences explain both outcomes
The situations below are invented teaching examples.
把术语说明印在练习纸上，学生能随时查，我也不用反复口头解释，真是一石二鸟。
“Printing the terminology notes on the worksheet lets students consult them whenever needed and saves me from repeating the explanation aloud: two aims achieved together.” The one action is printing the notes; the sentence names its two useful effects.
如果把两项手续安排在同一次到访中，就可能一石两鸟，省路程也省请假的次数。
“If we arrange both formalities for the same visit, we may achieve two aims together: fewer journeys and fewer occasions of taking leave.” 如果 and 可能 keep this a proposal. The wording does not announce that the arrangement has already worked.
Map the action before claiming the result
| Supplied situation | What the sentence can say | What is still missing |
|---|---|---|
| One revised worksheet includes definitions; learners consult it and repeated oral explanations are avoided. | The example supplies one action and two effects. | No extra outcome needs to be invented. |
| An organiser hopes one visit will cover two tasks. | A possible 一石二鸟 arrangement. | Confirmation that both tasks can be completed during that visit. |
| Two unrelated projects finish on Tuesday. | Two successes on the same day. | A shared action producing both results. |
| One plan improves access but reduces discussion quality. | One benefit and a tradeoff. | A second beneficial result, if the speaker claims two benefits. |
In a report, use ordinary words for the two effects before reaching for the idiom. That makes the claim understandable and lets a reader see whether it describes a possibility or an outcome.
Compare the emphasis with 两全其美
两全其美 emphasises preserving two desirable aspects rather than sacrificing one for the other. 一石二鸟 foregrounds the single action that accomplishes two things. An arrangement can support both descriptions when its context supplies both relationships.
Do not make a rigid rule that one expression always concerns people and the other never does. In the combined-visit example, name the practical effects. In a discussion-quality example, explain which two values the arrangement preserves. The explanation should guide the phrase choice.
Keep a proposed benefit separate from a delivered one
Original exercise: An event organiser has proposed combining two check-ins. Nobody has yet confirmed that both desks will be open. Which report is supported?
- “Combining the visits may save travel and time off, if both desks are available.”
- “The combined visit has already saved both travel and time off.”
Check the result claim
Report 1. It preserves the condition and proposed status. Report 2 claims completed effects that the exercise never supplies. The idiom does not turn an expected benefit into an observed result.
Sources and further reading
- Education Ministry Chengyu Dictionary revised-dictionary appendix: 一石二鳥Recorded spelling, pronunciation and lexical meaning; the English teaching examples and analysis here are original.
- Education Ministry Chengyu Dictionary revised-dictionary appendix: 一石兩鳥Recorded spelling, pronunciation and lexical meaning; the alternative spelling belongs to the same usage answer.