1. Prepare the materials
2. Purple sweet potato peeled, steamed and cut into pieces
3. Put the purple sweet potato and a small amount of milk into the wall breaker for juice
4. Take 1/3 of the prepared milkshake and pour it into the cup, add a small amount of milk to the wall breaker and stir again into a lighter purple potato juice and pour it into the cup, repeat this three times
5. Finally, add an appropriate amount of instant oatmeal to the cup
