
Separate the yolks from the whites. Keep 1 egg white and discard the other. Cut each yolk into 3–4 pieces, then drizzle the Shaoxing wine (or sake) over the yolks.
Bring vegetable stock or chicken stock to a boil. Then add the reserved egg white and yolk pieces. Cook up to 2 minutes.
Add the spinach and bring the soup back to a boil. You should cook quickly, about 2 minutes, just until the spinach is tender but still has some pleasant bite.
Add the goji berries and then turn off the heat. Transfer the soup to serving bowls and serve right away.