Tong sui, also known as tim tong, is a collective term for any sweet, warm soup or custard served as a dessert at the end of a meal in Cantonese cuisine. Tong sui are a Cantonese specialty and many varieties are rarely found in other regional cuisines of China. Outside of Cantonese-speaking communities, soupy desserts generally are not recognized as a distinct category, and the term tong sui is not used.
In Hong Kong, Macao and Malaysia, a large variety of tong sui is served in tong sui specialty stores. Tong sui stores have also gained prominence in overseas Chinese communities, and are found in various parts of Canada, Australia and the United States.