sì​hé​zhī​qīng

waiting for the millennium

Senses

俟河之清 sì​hé​zhī​qīng waiting for the millennium

to wait for the Yellow River to run clear; used as a metaphor for waiting for something impossible to happen, or for a corrupt political situation to become clean

References

see 河清/河清 → 俟河之清/俟河之清