The balcony door is higher than the hall door, which is usually considered to have a good meaning. One way of saying this is that the low balcony door represents a step-by-step promotion, while the different heights of the three doors mean that people in different places can make a lot of money every year.
But these statements are not universal, and not all families will believe these ideas. When choosing a decoration plan, it is still necessary to combine the actual needs and family aesthetics.