百试不爽 (Bǎi shì bù shuǎng)

Basic Info

• Chinese Idiom: 百试不爽 (Bǎi shì bù shuǎng)
• Pinyin: bǎi shì bù shuǎng
• Literal meaning: “A hundred trials without error.”
  (百 = a hundred / many times; 试 = to test / try; 不 = not; 爽 = error / discrepancy – not “refreshing” here)

Important note: In this idiom, 爽 (shuǎng) means “to be mistaken” or “to deviate from the facts.” It does not mean “refreshing” or “pleasant” as in modern everyday Chinese.

Figurative Definition

It means that a method, rule, remedy, or principle has been tested repeatedly and has never failed – it is completely reliable and effective. It is used to praise something that works every time it is tried, with no exceptions or errors.

It can describe:

• A proven method or technique – “这个方法百试不爽” (“This method never fails”).
• A reliable remedy or solution – effective in every case.
• A principle or rule – consistently true when applied.

In short: tried many times, never wrong – reliably effective.

Cultural & Historical Origin

This idiom comes from the Qing Dynasty scholar Liu Xianting (刘献廷), in his work Guangyang Zaji (《广阳杂记》), Volume 2:

“遂取泥压糖上，百试不爽，白糖自此始见于世。”

“Then mud was used to press down on the sugar – tested a hundred times without error – and white sugar first appeared in the world from this.”

The passage describes a technical process for refining white sugar: a method of pressing mud onto sugar to purify it. The technique was repeatedly tested and always worked – hence “百试不爽.” The idiom was born from practical observation and experiment, not abstract philosophy.

It is closely related to “屡试不爽” (lǚ shì bù shuǎng – “repeatedly tested without error”), which has virtually the same meaning.

Key Lesson

Reliability is earned through repeated testing. The idiom honors practical verification: a claim is only trustworthy after it has been tried again and again without failure. It teaches empirical thinking – do not believe something just because it sounds plausible; test it. But it also carries a quiet warning: “百试不爽” is always relative to conditions. A method that never fails in one context may fail in another. True wisdom knows both the reliability of the tested method and the limits of its application.

Cultural Note

In modern Chinese, “百试不爽” is a positive, practical, and fairly common idiom. It appears in:

• Everyday recommendations – “这个偏方百试不爽” (“This folk remedy works every time”).
• Business and technical writing – describing a proven strategy or formula.
• Personal advice – recommending a method that has never failed.
• Scientific and observational contexts – emphasizing repeated verification.

It is closely related to “屡试不爽” and “行之有效” (xíng zhī yǒu xiào – “effective in practice”). Its opposite might be “屡试屡败” (lǚ shì lǚ bài – “failing every time one tries”).

Similar English Expressions

• Tried and true – Proven reliable through experience – the closest equivalent.
• It never fails – A direct everyday equivalent.
• Works every time – Emphasizing consistent success.
• Foolproof – So well designed it cannot fail.
• Time-tested – Proven effective over a long period.
• To stand the test – To prove reliable under trial.
• Reliable / Dependable – Consistent and trustworthy.
• A surefire method – Certain to succeed.

The closest and most natural equivalents are “tried and true,” “it never fails,” and “works every time.”

In short, “百试不爽” means a hundred trials without error – a practical, empirical idiom for proven reliability, and a reminder that the best ideas are not just clever – they are tested, retested, and still standing.