First, soak mung beans one night in advance. If you want to peel them, grab them by hand after soaking and filter out the mung bean shells.
Secondly, put the mung beans into the dish and drain the water in the dish. As long as mung beans are sweet, you can put sugar.
Finally, put it into a rice cooker and steam it in water. Use a steamer or an iron shelf with something steamed under it, press the cooking button and steam it out of the pot.
In fact, steaming mung beans and red beans is a practice, as long as they are soaked in advance. To be more soft and rotten, you can soak and peel it and put it in the refrigerator for an hour. It is easier to be soft and rotten after steaming.