Soak black beans and soybeans for one day, then put them into a soymilk machine and add water to the water level. Press the soybean milk button, make it, pour it into a bowl, add the right amount of sugar and mix well before drinking. Personally, I think beans should not be soaked. I don't usually filter bean dregs. I'll drink it together, and bean dregs are also very good. There is another way to waste things, but the nutrition is not lost. It is to use the old-fashioned soymilk machine to beat the soaked beans into pulp, then filter out the juice, pour it into the pot and cook it on high fire. After boiling, skim off the floating foam and cook it slowly on low fire. In this way, soybean milk does not lose nutrition and tastes better.