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"I hope you will be a great cartoonist by the time I come back." "When I see you again, you must appear in front of me with colorful auspicious clouds." I hope you will be worthy of meeting each other again. What does it look like to say goodbye?

According to calculations by the Northern Song Dynasty philosopher Shao Yong, Things in the world will completely reappear in one hundred and twenty-nine thousand six hundred years, That is to say,...