**** 蒙古斑：MOUKO-HAN;Mongolian Spot ****
Japanese babies and some of Chinese babies have blue spot on the back or hip.
It will disappear usually around age of ten. but some people have it until age of 20.
This spot sometimes cause problems when the parents show the baby to the western doctor who does not know about the Mongolian Spot. The doctors regards the spot as the evidence of the Child abuse.