Remove the core of the ginkgo nut, clean it and set it aside.
Put the soaked beancurd skin and barley in a pot, pour in water, and bring to a boil over high heat, then turn to medium-low heat and cook for about 1 hour.
After the soup turns milky white, add ginkgo nuts and rock sugar.
Cook until sugar melts, add soy milk and pandan leaves. Bring it to boil and enjoy.