1. First of all, the upper and lower needles are knitted in groups of 2 needles, so start with double needles first. In order to prevent wool from rolling up, two rows are knitted at the bottom with upper and lower needles, and then knitted with large flat. When knitting four or six rows, the swallow stopped and began to collect the needles.

2. Then in the line with a small tail at the beginning, it turns out that the whole line is knitted, and the first stitch is not knitted, and the last four stitches are harvested by swallows.

3. From the left, the second needle falls on the right stick needle, the third needle falls on the other stick needle and the fourth needle falls on the right stick needle.

4. Use the left stitch to reverse a stitch on the third stitch (the third stitch in front), and then the third stitch is not needed and put aside.

5. Continue to use the left patch needle, and put a needle on the right patch needle from right to left (opposite to the direction of ordinary patch needle). At this time, the two needles in the middle cross, and the effect is as shown below. Finally, pour the second needle on the right needle onto the left needle.

6. At this time, only 1 stitch is left on the right stitching, then the next two stitches are combined into 1 to knit the upper stitch, and then the next two stitches are combined into 1 to knit the lower stitch, so that the four stitches of the swallow's needle collection become two stitches.

7. This is completed, and the effect diagram is as follows.