tiān​jī​bù​kě​xiè​lù

top secret

天机不可泄露 天機不可泄露 tiān​jī​bù​kě​xiè​lù
top secret
literally meaning "mysteries of heaven must not be revealed"; used as an idiom to say that one is not at liberty to inform someone about a secret or that a matter must be kept strictly confidential

Frequency

Written text
0.062 per million

Cross-References

Has variant

Sources

Frequency data
BCC Corpus (BLCU)