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I don't know how to introduce this work. I just want to tell a person's journey from college to doctorate to university teacher from my own perspective, and tell the real life state and spiritual journey of domestic college students, graduate students, doctors and university teachers. I write these words not to make money, nor to attract people's attention, but to record my life over the years, and just want to tell people a real world of knowledge. This work will not set up VIP and will not charge any fees.