An American teacher and children make tangyuan, a kind of round and sweet dumpling made of glutinous rice flour, to celebrate the upcoming Winter Solstice festival at a kindergarten in Lijiaxiang Township in Changxing County, east China's Zhejiang Province, Dec. 21, 2017. Winter Solstice, the shortest day of the year, falls on Dec. 22 this year. In Chinese culture, it marks the beginning of deep winter and a break from farming in traditional agricultural society. It is also a time for family gatherings. (Xinhua/Xu Yu)