往返

wǎngfǎn
to go back and forth; to go to and fro; to do a round trip

CEDICT

Entry Composition

=1 往 wǎng
  1. to go (in a direction)
  2. to
  3. towards
  4. (of a train) bound for
  5. past
  6. previous
=1 往 wǎng old variant of 往 wǎng
2 返 fǎn to return (to)