2. Put the sweet potato into the pulverizer, as shown in the figure.
3. This is the squeezed sweet potato juice, as shown in the figure.
4. Pour the sweet potato residue out of the pulverizer, as shown in the figure.
5. Stir the sweet potato juice and sweet potato residue evenly, as shown in the figure.
6. Pour the filter screen, and then rinse with water until the filtered water is clear, as shown in the figure.
7. Let the filtered water stand for 2 hours, and then pour out the yellow water, as shown in the figure.
8. The remaining white is sweet potato starch, as shown in the figure.
9. Take out the sweet potato starch and dry it, as shown in the figure.