Introduction: A talented boy who smiles but hides his evil deeds. Chang carries the aspiration of "losing all the rouge horses in the world, and catching all the flowers at his fingertips". Compared with ordinary time travel, this story is different from the arrogant ending of other time travellers. It is a story about returning to the world where he has lived for many years and still being ordinary. Because of the past heartache, and also because ordinary life is simple and there are not so many fatal responsibilities that require you to step forward. And he may have experienced too much such responsibility. Family, country, nation... Perhaps seeing true knowledge in the ordinary is the most appropriate way of life.
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