During Tết, we have many rules to follow.
For example, if you sweep the house, you can sweep away good luck.
It is important to have a good first visitor, or xông nhà.
This person can bring good or bad luck for the whole year.
Also, crying, breaking things, or saying unlucky words is not allowed.
Many families still believe in these rules and follow them closely.
They want to start the new year with good luck and happiness.