Soupe du jour is a French phrase meaning "soup of the day". It is normally used to refer to the specific flavour of soup being served in a restaurant on a given day.
On menus, in the English language, it is very often referred to as "soup du jour", instead of using the French spelling of "soupe".
As a rule of thumb in Cantonese dining, the spiciness of a dish is usually inversely proportional to the freshness of the ingredients.
The soup is usually a clear broth prepared by simmering meat and other ingredients for several hours.
The ingredients of a rather expensive Cantonese slow cooked soup are: fresh whole chicken, dried air bladder of cod fish, dried sea cucumber and dried abalone (花膠海參鮑魚雞湯).