Instant pot method:

Cup of Yum
1. Wash or rinse 1 cup of red beans ( 8.5 oz). Then, put it into the instant pot, pressure cooker.
2. Next, add 2 small pieces of dried mandarin peels (2 g). 
3. After that, pour 6 cups of water into the instant pot. Close the lid and vent. Then, push the manual button and adjust time for 45 minutes at high pressure.
4. The following, quickly release the pressure and open the lid. Then, add ¾ cup of rock sugar or brown sugar (add sugar to your taste). Push the button sauté for 30-40 mins until it thickens. Remember to stir it once a while to prevent the bottom from burning. (It depends what viscosity you want. The longer it takes for sauté, the thicker it becomes.)

Stove top method:

1. Wash or soak 1 cup of red beans ( 8.5 oz) for 2-4 hours before cooking. Then, put it into a big pot. 
2. Next, add 2 small pieces of dried mandarin peels (2 g) into the pot. 
3. After that, pour 6 cups of water into the pot. Turn on medium high fire. When the water is boiling, turn the fire to small. Let it cook and simmer for 1.5-2 hours or until the beans are soft.
4. Then, add ¾ cup of rock sugar or brown sugar (add sugar to your taste). Keep simmering until it thickens or the viscosity you want. Remember to stir it once a while to prevent the bottom from burning.