1. First, press the cotton thread on one side with one hand, and then wrap it around the zongzi with the other hand;

2. After winding for the first time, be sure to pull it hard with the hand that pulls the string to ensure that the string is tied tightly, otherwise the zongzi will easily come loose when it is cooked in the pot;

3. Pull the cotton thread under the zongzi after tying it once, and then tighten it after winding it once more;

4. decide how many times to wind the zongzi according to its size, and then take out the thumb pressed at the top of the zongzi;

5. After the thumb is taken out, there will be a loose place, and then the other end of the cotton thread will pass through;

6. Wrap the cotton thread through the gap and tie it into a slipknot, so that you can easily pull the slipknot when eating.