  We investigate the possibility of the enhancement of parity-violation signal
in bouncing cosmology. Specifically, we are interested in deciding which phase
should generate the most significant parity-violation signals. We find that the
dominant contribution comes from the bouncing phase, while the contraction
phase has a smaller contribution. Therefore, bouncing cosmology can enhance the
parity-violation signals during the bouncing phase. Moreover, since the
bouncing phase has the highest energy scale in bouncing cosmology, we can also
probe new physics at this scale by studying the parity-violation effect.
