Rinse the soybeans thoroughly and soak them for 8 to 12 hours.
Boil the soaked soybeans in boiling water for 10 minutes.
Remove the skins from the boiled soybeans.
Blend the peeled soybeans with water until smooth.
Cook the noodles and rinse them in cold water.
Place the cooked noodles in a bowl and pour the soybean soup over them.
Top with julienned cucumber, salt, or other garnish to finish.