Tool materials: wool, knitting needles.

1. First, hook three braids and insert the needle into the first braid. Pull out 1 turn, there are two turns on the needle.

Guide the wool through two loops, and now there is a loop on the needle.

3. Insert the needle into the braid on the left to form a circle. At this time, there are two rings on the needle.

4. Guide the wool through two loops to form a loop on the needle.

5. Repeat steps 3 and 4, crochet to a suitable length and put it on the bag for later use, as shown below.