  The recent progress of multiple chiral doublet bands (M$\chi$D) is reviewed
for both experimental and theoretical sides. In particular, the experimental
findings, theoretical predictions, selection rule for electromagnetic
transitions, M$\chi$D with octupole correlations and some related topics are
highlighted. Based on these discussions, it is of highly scientific interest to
search for the more M$\chi$D as well as the possible chiral wobblers,
chirality-parity quartet and chirality-pseudospin triplet (or quartet) bands in
nuclear system.
