清零

qīnglíng
  1. to restore sth to its initial state
  2. to reset (an odometer etc)
  3. to empty (a bank account)
  4. to eradicate (a disease)
  5. (computing) to clear (memory)
  6. to zero (a hard drive)

CEDICT

computing

Entry Composition

1 清 qīng
  1. (of water etc) clear; clean
  2. quiet; still
  3. pure; uncorrupted
  4. clear; distinct
  5. to clear; to settle (accounts)
2 零 líng
  1. zero
  2. nought
  3. zero sign
  4. fractional
  5. fragmentary
  6. odd (of numbers)
  7. (placed between two numbers to indicate a smaller quantity followed by a larger one)
  8. fraction
  9. (in mathematics) remainder (after division)
  10. extra
  11. to wither and fall
  12. to wither