https://en.wikipedia.org/wiki/Lantern_Festival
Tangyuan or Yuanxiao,
Eaten during the Lantern Festival, tangyuan '湯圓' (Southern China, Taiwan and Southeast Asia) or yuanxiao '元宵' (Northern China) is a glutinous rice ball typically filled with sweet red bean paste, sesame paste, or peanut butter.[3] Actually, tangyuan is different from yuanxiao due to different manual making and filling processes.[18] However, they are very similar in shape and taste, so most people do not distinguish them for convenience and consider them as the same thing.[18] The Chinese people believe that the round shape of the balls and the bowls in which they are served symbolize family togetherness, and that eating tangyuan or yuanxiao may bring the family harmony, happiness and luck in the new year.[2][4]