Among the cold food customs in various places, the old Beijing cold food custom, which is known as the "Thirteen Unique Cold Foods", is the most representative. These thirteen unique skills are snowballing, Aiwowo, sugar ear, sugar fire, ginger fork, inby, cactus twist, pea yellow, screw twist, cream fried cake, hard flour cake, sesame paste biscuit and Saqima.

During his stay in Tomb-Sweeping Day, Jiangnan had the custom of eating green jiaozi. Green jiaozi is to mash a wild plant called "Pulp Wheat Straw" to squeeze out juice, then mix this juice with dry pure glutinous rice flour, and then wrap it in jiaozi.

Jiaozi's stuffing is exquisite sugar bean paste, and a small piece of sugar lard is added when filling. Jiaozi cooked it and steamed it in a cage. When they come out, brush the cooked vegetable oil evenly on the surface of jiaozi, and you're done.