1. Wash red beans and soak them in a little water for 2 hours.
2. Put the washed red beans into the pot and crush them with an electric pressure cooker.
3. The cooked red beans are slightly cold, then pour into the main pot and cook for 2 hours.
4. In the process of cooking, pour the oil in three times and stir well. After each time, the oil is mixed with the red bean paste, and then drops again. Finally, add sugar and stir well.
5. After the red bean paste is completely cooled, put it in a fresh-keeping box and put it in the refrigerator for preservation.