How to play CD threading?

Threading: Use compasses and scissors to pierce two small holes in the center of the disc. The distance between the two holes should not be too far, about 5-7 mm, then select the prepared cotton thread to a suitable length, put on a straw, pass through the two small holes on the round paper in turn, tie a knot and turn the small flywheel.

We wound our forefinger around the straw on the rope for several times, and then pulled both ends of the rope, and a wonderful situation was born.

Draw two perpendicular center lines, that is, the diameter line of the circle, based on the disk, and then draw a circle at the center point with the center distance of the four holes. The intersection of two vertical center lines of a circle is the center point of the four holes you want.