There are sweet spring rolls with red bean paste inside from areas in Eastern China, such as Zhejiang and Northern China.

在华东的浙江和华北等地区，春卷是甜豆沙馅的。

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Don't worry though; there are no surprises in Zongzi. They are just rice with either meat or sweet red bean paste wrapped inside.

不过别担心，粽子里面没什么特别的东西，只是米饭包着肉或豆沙而已。

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It is a block with a layer of red bean paste inside.

制成内有赤豆沙馅。层次分明卷块。

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But before partaking of the deep-green elixirs, guests are offered tea sweets known as wagashi: beautiful, bite-size confections made with ingredients ranging from red bean paste to green tea itself.

WSJ: The Sweet Way of Wagashi