徵

zhǐ
4th note in the ancient Chinese pentatonic scale 五音 wǔyīn, corresponding to sol

CEDICT

Homographs

徵 zhēng
  1. to invite
  2. to recruit
  3. to levy (taxes)
  4. to draft (troops)
  5. phenomenon
  6. symptom
  7. characteristic sign (used as proof)
  8. evidence