1. Prepare ingredients.
2. Pour the soybeans into the soymilk machine.
3. Add pure water to the soybean milk maker.
4. Select the dry bean mode.
5. Fresh soy milk squeezed out with a broken wall soymilk machine.
6. Soak the rice for 2 hours in advance.
7. After the yam is peeled and steamed, it is pressed into a puree.
8. Soak the rice and add soy milk.
9. Add yam puree.
10. Simmer for two hours. The waterless saucepan I used, if not available, it can be boiled in an ordinary pot.