源清流清
yuán​qīng​liú​qīng

if the source is clear the stream will be clear

  1. 源 yuán noun
    source
    (bound form) source of a river; fountainhead; starting point of a stream
  2. 清 qīng adjective
    clear
    clear; transparent; pure; clean and free of impurities
  3. 流 liú noun
    stream
    a stream of water or a continuous moving mass of something resembling a liquid, such as air or electricity
  4. 清 qīng adjective
    clear
    clear; transparent; pure; clean and free of impurities