2. Add water to the flour to make a paste, then add the rice paste to the sweet potato powder, rub it hard, and finally make it into a ball.

3. While boiling water, knead the sweet potato powder on the other side until it can drip slowly.

4. Prepare a plastic tooth cup, poke 4 holes under it, the diameter is almost one finger thick, put the sweet potato ball in, and let him slowly flow into boiling water.

5. Continue to stir in boiling water. If the powder is cooked, it will float up, scoop the cooked powder into a clear water bucket prepared next to it and let it cool. Stir slowly until all the powder floats up, and then scoop it into a clear water bucket.

6. Take out all the powder in the clear water bucket, divide it into several parts and put it in the shade. The powder in the bucket is very q, so it is not fragile. You have to pull hard to segment it.