“Thick soup” is different than simply “soup”. For example, Scallop Shredded Duck Thick Soup, uses water chestnut flour to thicken the soup consistency instead of corn starch because water chestnut flour results in a clear colored soup and won’t turn watery after the soup cools down. Black fungus helps clean and maintain the flow of blood vessels, lowering cholesterol. The use of Quail is to increase the soup‘s flavor.