Collect "five grains" such as millet, rice, corn, wheat, sorghum and beans, and let the family scatter on the ground at the gate. Then the householder swept the "five grains" into the yard with a broom, and then wrapped them in red cloth and buried them in the foundation to show the prosperity of the family business.
At the moment when the building was just started, family members often went in and out at the gate to show their freedom.