First of all, you need a soymilk machine, right amount of black beans, red beans and soybeans.

Exercise:

1. Soak black beans, red beans and soybeans in a pot for one night (just soak them the night before drinking, and add more if you need to thicken the beans, so that the beans will become soft after soaking for one night).

2. Put the soaked beans into the soymilk machine, add appropriate amount of water, and let the soymilk machine start working.

3. you can add some sugar to the soybean milk after you finish ~ this is done.