What does it mean to hang the curtains for the wedding, my sister's wedding let me hang the curtains I do not understand what it means.

Probably means that, when the bride and groom cross the doorway of the bridal chamber of the fire pot, they will immediately take out the ready red embroidered mandarin curtains to hang up, the mouth but also read aloud: the left hand to hang, the right hand to mention, on the hanging curtains to give birth to a noble son, hanging curtains to give birth to a scholar, hanging with both hands, to give birth to a fat doll in the coming year.