Kashinfu went into exile in China in the 1920s. He found a very strange butterfly in a mysterious valley in Yunnan-the wings on the left and right sides are designed differently, with a beauty on the left and a skeleton on the right, which together is a' ghost beauty'! Kashenfu published a paper in the American Journal of Biology and sent a unique specimen of "Ghost Beauty". This butterfly only existed in ancient legends and immediately shocked the world. ? Legend has it that there was a butterfly in ancient times? A beautiful butterfly named Kashenfu? The left wing turns all beings upside down for beauty, and the right wing is bizarre for skeletons? Between wings? Joy and fear alternate? "Kashin's ghost butterfly" is the monarch butterfly.