Glutinous rice flour is used to make Yuanxiao with a black sesame seed filling. [Photo/China News Service]

Unlike Yuanxiao, which is made by a process of rolling a hard stuffing in glutinous rice flour, Tangyuan is prepared by placing the filling inside a rice flour wrapping, similar to how jiaozi are prepared. [Photo/China News Service]

For both Yuanxiao and Tangyuan, black sesame seed is often a favored filling. [Photo/China News Service]