1. Wear the same color thread respectively. Needle A goes ahead and prepares two needles. The number of shares required for the hook; B-stitch goes the reverse side and is used for fixing, and a single strand is enough.

When you reach the tail of the hook, poke the line of the hook back to your back.

3. After a few squares, go under the second cloth, and the embroidery needle comes up from the first cloth eye. That is, the first paragraph before the first turning point of hemming), and then the embroidery thread is wound on a wide-ranging bar, and the embroidery needle comes back from the eye, and so on.