ENGLISH
REFERENCE

Chinese Wall

idiom
Meaning

An information barrier within an organization, designed to ensure internal confidentiality; frequently used to prevent conflicts of interest.


Origin

first recorded 20th c. disputed origin

The expression Chinese Wall comes from the Great Wall of China and became a metaphor of barriers, known to go back to the United States stock market crash of 1929. The U.S. government saw the need to maintain separation (or an information barrier) between investment bankers and brokerage firms, to limit the conflict of interest between the two. The first use of Chinese Wall in the general context of keeping confidentiality is unclear.

Examples
SIMPLE

The bank uses a Chinese Wall to keep client data private.

CONTEXTUAL

The law firm established a Chinese Wall between the two teams to prevent a conflict of interest during the merger.

COMPLEX

To maintain regulatory compliance, the investment bank implemented a strict Chinese Wall, ensuring that the research department remained entirely isolated from the trading division.

Anchors to
Related idioms8entries
  1. 01

    back to the wall

    A very difficult situation with no beneficial options available for action.

  2. 02

    balls to the wall

    With maximum effort or commitment.

  3. 03

    bang one's head against a brick wall

    To waste effort on a futile project.

  4. 04

    blue wall of silence

    Strict secretiveness maintained by the members of a police force with respect to information which might be contrary to their interests, especially information concerning questionable police actions.

  5. 05

    break the fourth wall

    To apparently communicate with reality directly, such as when characters of literature comment on the existence of a reader.

  6. 06

    Chinese compliment

    A pretense of deference; a veiled or subtle insult.

  7. 07

    Chinese green

    Synonym of lokao.

  8. 08

    Chinese overtime

    Any form of overtime in which increasing the hours worked reduces the hourly rate.

© 2026 English Reference