Hong dou tang, hong dou sha, or red bean soup or che dau do is a sweet Chinese dessert soup made from azuki beans.^[1] served in Mainland China, Taiwan, Hong Kong, Macau, and places with Chinese diaspora. It is categorized as a tong sui, or sweet soup. It is often served cold during the summer, and hot in the winter. Leftover red bean soup can also be frozen to make ice pops and is a popular dessert.

In Cantonese cuisine, a red bean soup made from rock sugar, sun-dried tangerine peels, and lotus seeds is commonly served as a dessert at the end of a restaurant or banquet meal. Common variations include the addition of ingredients such as sago (西米 xīmi), tapioca, coconut milk, ice cream, glutinous rice balls, or purple rice. The two types of sugar used interchangeably are rock sugar and sliced sugar (片糖).^[2]

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  With jian dui ball
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• Shiruko
• Patjuk
• Red bean ice
• Red bean paste
• Red bean shaved ice
• List of bean soups
• List of Chinese soups
• List of legume dishes
• List of soups