Quick answer: 小心 is the warning
小心 (xiǎoxīn) means be careful or watch out. It is used about a concrete risk in the moment: a slippery floor, a moving car, a hot pan, a fragile object. 小心点 (xiǎoxīn diǎn) softens it into “be a bit careful”, and 小心啊 adds warmth.
小心 is also productive, which is why it shows up everywhere in signage. 小心地滑 means caution, wet floor. 小心台阶 warns about a step. 小心玻璃 warns about glass. The pattern is 小心 plus the thing to watch for.
| Chinese | Pinyin | Meaning | When to use it |
|---|---|---|---|
| 小心 | xiǎoxīn | Be careful | About a specific, immediate risk |
| 小心点 | xiǎoxīn diǎn | Be a bit careful | Softer, often between friends |
| 当心 | dāngxīn | Watch out | Similar to 小心, often on warnings |
| 注意 | zhùyì | Pay attention to | Instructions and ongoing attention |
| 保重 | bǎozhòng | Take care of yourself | On parting, especially after illness or travel |
保重 is the “take care” of a farewell
保重 (bǎozhòng) literally means to preserve your health and weight — that is, to look after yourself. It is said when parting, particularly when the other person is travelling, unwell, working too hard or facing a difficult period. 保重身体 (“take care of your health”) is the fuller form.
This is the phrase English speakers often want when they say “take care” at the end of a message. 小心 would be wrong there, because there is no specific hazard to warn about. If the situation is casual, 照顾好自己 (take good care of yourself) also works.
小心 versus 当心 versus 注意
小心 and 当心 are close. Both warn about a risk, and both appear on signs. 当心 tends to carry a slightly sharper warning tone and is common on notices, while 小心 is the more general everyday word.
注意 (zhùyì) is different in kind. It means to pay attention or to take note, and it is not a warning about danger. 注意听 means listen carefully, 注意身体 means take care of your health, and 请注意 is the polite “please note” in announcements. The distinction is between attending to something and avoiding harm.
小心 + noun: reading Chinese warning signs
Because 小心 attaches directly to what to watch for, a few combinations are worth memorising. 小心车 warns about traffic. 小心狗 warns that a dog is present. 小心火 means watch out for fire. 小心碰头 warns about a low beam. The pattern is regular enough that once you recognise 小心, you can read most of a Chinese warning sign even without the rest of the sentence.
小心眼 is a different word entirely
Some combinations built on 小心 do not mean “be careful”. 小心眼 (xiǎoxīnyǎn) means petty or narrow-minded, and it describes a person who takes offence easily or holds small things against others. It is a criticism, not a caution. Recognising that 小心 is a component rather than a command saves a real misunderstanding.
What it does not mean
小心 does not mean to be cautious by personality, and it is not the same as 谨慎 (jǐnshèn), which describes a careful disposition. 保重 is not a warning and does not mean “be careful” in the hazard sense. Neither phrase is a blessing or a promise of protection.
Common mistakes
- Saying 小心 at a farewell where 保重 belongs.
- Using 保重 about a specific immediate hazard.
- Confusing 注意 (pay attention) with 小心 (watch out for danger).
- Reading 小心眼 as “be careful with your eyes”.
- Assuming 当心 and 小心 are not interchangeable; in practice they mostly are.