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This is a martial arts novel, but the protagonist is not a swordsman or a swordsman-- The protagonist is a "point". It is the origin of geometry. All the swords and grievances and grievances in the world were born of him and resolved by him. Hengjian Sect is the horizontal axis, and Zongdao Sect is the vertical axis. The triangle is the formation, the circle is the protection, the parallel lines are the destiny, and the symmetry is the truth. If you look at it from the perspective of martial arts, you can see the light of swords, the shadows of swords, the love and hatred; If you look at it through mathematics, you can understand the vertical and horizontal lines of points and the wonderful interest of geometry. One book, two ways of reading. Please take your seat.