The seasonal round cakes traditionally have a sweet filling of lotus seed paste or red bean paste and often have one or more salted duck eggs in the center to represent the moon.
圆圆的月饼中通常包有香甜的莲子馅或是红豆馅，馅的中央还会加上一个金黄的咸鸭蛋黄来代表月亮。
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In the south, the favorite traditional filling is lotus seed paste, while northerners like everything from red bean and date paste to ham and nuts.
After all these years, I have gotten used to the northern dumplings that use a lot of beans, cereals, lotus nuts, dates and sweetened bean pastes as filling.