From: Phaidon China Cookbook, p.98
Put the mushrooms into a bowl, cover with cold water, and soak for at least 20 minutes, or until softened.
Cut the mushrooms into ¼-inch/1 cm pieces.
Meanwhile, combine the dried scallops and ½ cup (4 fl oz/120 ml) cold water in a small bowl and soak for 15 minutes. Strain, then remove the small hard muscle. Reserve the soaking water.
Bring the chicken broth (stock) to a boil in a large saucepan.
Add the scallops, soaking water, mushrooms, pork, winter melon, ginger, and 2 cups (16 fl oz/475 ml) water and return to a boil.
Reduce to low heat and cook for 1 hour.
Add the salt, adjust the seasoning to taste, then transfer to a tureen to serve.
