一股清流

yīgǔqīngliú
(fig.) a breath of fresh air

CEDICT

Entry Composition

1 一股 yīgǔ a clump of; a bunch of
2 清流 qīngliú
  1. clean flowing water
  2. (fig.) (literary) honorable person, untainted by association with disreputable influences
  3. scholars who (in former times) kept themselves aloof from the corrupting influence of those in power

Related entries

耳目一新 ěrmùyīxīn
  1. a pleasant change
  2. a breath of fresh air
  3. refreshing