Qingtuan ,which literally means green bulb ,was (originally )  an offering for  ancestors during QingMing . As 他和 custom of worshiping ancestors , has weakened  with time ,it is now  regard as a favored  spring outing (snack ) , especially popular among people in south of (yangzi) river . Qingtuan ,is (a round ) green dessert , its green dough is made by mixing glutinous rice flour  with boiled mugwort juice  .  The dough is then wrapped around red bean paste  or other sweet fillings ,  then steamed until cooked ,the combination of  its soft and chewy dough with sweet and smooth filling make it delicious light snack . Now ,more  new type of qingtuan  are available , and some novel fillings are  even going  viral ,such as egg yolk with meat ,vegetarian option filling with fruit  . worshiping  敬奉神 dough 面糊 glutinous  粘的， mugwort 艾草 paste 面糊 steamed  蒸熟 chewy 难嚼的 有嚼劲的 novel 新颖的 viral 迅速传播的