soak the red beans for one night the day before cooking, so that the red beans will soon turn rotten

Then put 21 bowls of boiled water together with the red beans in a pot, and see if the red beans are rotten after boiling! If it is rotten, put 2 pieces of sugar and boil it again!

after the sugar slices are dissolved, put 2 boxes of white bean jelly in the pot to dissolve! Bring the fire to a boil rather than boil it! Finally, pour the finished product from the pot into a stainless steel plate and let it cool.