Dumplings on Dongzhi
"The Dōngzhì Festival or Winter Solstice Festival (Chinese: 冬至; Pinyin: dōng zhì; "The Extreme of Winter") is one of the most important festivals celebrated by the Chinese and other East Asians during the Dongzhi solar term (winter solstice) on or around December 22 when sunshine is weakest and daylight shortest." via wikipedia.
This special festival is on December 22 this year, there were hordes of people at the restaurant of dumplings that day in north China, they might eat Tangyuan in the south China, but some old native people in Beijing would like Huntun or wonton, the dumplings in soup.