How many zongzi to hang is generally determined according to the family population and the size of the door. Generally speaking, single or small families can hang 1-2, large families can hang 3-5, and older ones can hang more. The specific figures vary according to regions and customs.
Except during the Dragon Boat Festival, some places will hang zongzi on other important festivals or festive occasions, such as the Lunar New Year and weddings. These zongzi are usually decorated with ribbons and flowers, which is more festive.