1, pour the washed soybeans into the pot and cook until they are 90% ripe, then take them out and put them in a basin to cool.

2. When the soybeans in the basin are no longer hot, squeeze them into an oval cake shape by hand.

3. Put the soybean cake in the sun until it is half dry, and then put it in the basin. Put the pot in the shade of the house for about ten days until the soybean cake in the pot grows long as shown in the figure.

4. Mash the long-haired soybean cake with a wooden stick, then add a proper amount of cold water and mix well.

5. Then put the basin on the balcony and expose it to the sun. It will be sunned for a summer, until the soybean sauce in the basin is sunned black. Then the bean paste is made.