Metaplasia generally means that life has undergone some change or transformation, a metamorphosis or rebirth, which means that things have changed from one state or form to another. In Buddhism, "metempsychosis" usually refers to the reincarnation of human or animal souls after death and transformation into other life forms, that is, "metempsychosis". In Taoism, "metaplasia" usually means that people have changed their original life state and acquired new life forms by cultivating immortals. In modern Chinese, "metaplasia" is often used to describe the change of everything or the transformation or rebirth of characters experience.
For example, "Spring rain moistens the earth, and plants are reborn from the yellow state." "Metaplasia" here means that plants have recovered their vitality from a withered and yellow state after being moistened by spring rain, that is, they have experienced a metamorphosis or rebirth.
Another example is: "After years of hard work, he finally achieved a positive result and turned into a fairy." "Metaplasia" here means that the yogi has reached the realm of immortality through hard training, transforming from the original state of life into a new form, that is, realizing the transformation from mortal to immortal.