Nai Si is a traditional Chinese dessert made from sweetened condensed milk and often flavored with various ingredients like fruit or nuts. It is typically served chilled and has a creamy texture, making it a popular treat during warm weather. The dessert can be found in many regions of China and is enjoyed by people of all ages. The name "Nai Si" translates to "milk silk," reflecting its smooth consistency. This dessert is often associated with Chinese cuisine and can be found in dim sum restaurants or as a street food item. Variations may include toppings such as red beans or tapioca pearls.