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Tong Yihuai snorted his hair with a smile. "Well, Polaris is not the name of a certain star, but the star closest to the extension line at the northern end of the earth’s axis, and because the earth’s axis of rotation will swing periodically, that is, the Polaris will also change periodically at precession. What we see now is that Polaris Hook Chen Yi probably started in the Song Dynasty, and in less than 500 years, Polaris will become Hook Chen Si."

Chen Song found Gou Chen Si under the guidance of...

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