On the first and fifteenth day of each month, feng shui is taboo.

Taboo on the 15th of every month: When entering the door, women take their right feet first, and men take their left feet first. They must not step on the threshold, and the bigger the step, the better.

Taboo on the 15th of every month: If you burn incense, you will pray for yourself three times, six times in the second generation and nine times in the third generation.

On the fifteenth day of every month, there are several things you should not do: you should not kill animals, eat meat, cut your nails, and quarrel.