秘而不宣 (mì ér bù xuān) — to keep something secret; to not disclose; to conceal

Definition

Examples

• 这件事他一直秘而不宣，连家人都不知道。
  Zhè jiàn shì tā yì zhí mì ér bù xuān, lián jiā rén dōu bù zhī dào.
  He has kept this matter a secret, not even his family knows.
• 公司对新产品计划秘而不宣，直到发布会才公开。
  Gōng sī duì xīn chǎn pǐn jì huà mì ér bù xuān, zhí dào fā bù huì cái gōng kāi.
  The company kept the new product plan under wraps and only revealed it at the launch event.
• 他们秘而不宣地进行了谈判，外界毫不知情。
  Tā men mì ér bù xuān dì jìn xíng le tán pàn, wài jiè háo bù zhī qíng.
  They conducted the negotiations in secret, completely unknown to the outside world.