1. First, take a portion of sweet potato flour.
2. Then, fold or break it, cut it and put it on a plate.
3. Then add about 50 degrees of warm water to soak the sweet potato flour. If there's some showing on the surface of the water, you can press it in with a bowl to soak it.
4. Then, soak for 30 to 50 minutes.
5. When cooking, wait until the water boils.
6. Cook for 5 to 10 minutes, depending on how soft it is.