Not necessarily, just a folk custom. When the bride goes out of her family's house on the wedding day, she needs the help of her father or [Sister Daikin or Bridesmaid] to hold a red umbrella, which means spreading the branches and leaves.

Another moral is: shielding the sun with a red umbrella is commonly known as [killing people] or it can be said: I am afraid that God will be jealous of the bride, and disaster will befall me.

Give it to the bride, so cover it with a red umbrella to prevent the bride from being irradiated by murderous look. Then the mother or other sisters left and dispersed.

Whole grains, commonly known as "feeding golden roosters", have the meaning of ward off evil spirits. [Avoid the "golden rooster" blocking the bride's road] This is just the family's good wishes and expectations for the couple. I hope my answer can help you.