改元

gǎiyuán
to change an emperor's or ruler's reign title (old)

CEDICT

old

Entry Composition

1 改 gǎi
  1. to change
  2. to alter
  3. to transform
  4. to correct
2 元 yuán
  1. currency unit (esp. Chinese yuan)
  2. (bound form) first; original; primary
  3. (bound form) basic; fundamental
  4. (bound form) constituent; part
  5. (prefix) meta-
  6. (math.) argument; variable
  7. era (of a reign)
  8. (Tw) (geology) eon