長足

长足
chángzú
remarkable (progress, improvement, expansion etc)

CEDICT

Entry Composition

1 長 cháng
  1. long
  2. (bound form) length
  3. (bound form) strong point; forte
  4. (bound form) to be good at
  5. (literary) surplus; spare (Taiwan pr. zhàng)
2 足 zú
  1. (bound form) foot; leg
  2. sufficient; ample
  3. as much as; fully