Potato flour can't replace white bean jelly, but it can be made into white bean jelly; 100g potato starch, mixed with 500g water, can be measured by one cup, and one cup of starch is mixed with 5 cups of water. Pour the prepared batter water into the pot, stir while cooking, cook until it is thick, find a container, put it in the refrigerator until it solidifies, cut it into thin strips, and add your favorite seasoning.