Egg tong sui, is a classic tong sui (sweet soup) within Cantonese cuisine. It is also known as daan tong sui or sweet egg soup. It is essentially a sweet version of egg drop soup as it is considered a traditional Chinese dessert soup.
The difference between the two is that the dessert, egg tong sui, features strands of egg in a clear broth flavored with ginger and rock sugar while egg drop soup has swirls of beaten eggs in flavorful, chicken broth.