In ancient times, folk in the heavy yang has the custom of climbing high, so the heavy sun festival is also called "climbing high festival". It is said that this custom began in the East Han. The Tang Dynasty writers wrote a lot of high poems, mostly the custom of writing the festival of heavy Yang; Where you go, there is no one-of-a-row rule, generally a mountain, a tower. There is also the custom of eating "heavy sun cake".
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