Traditional Culture Encyclopedia - Hotel accommodation - What do you mean by "welcome three and get seven"

What do you mean by "welcome three and get seven"

When the guests came, they took the first three steps to welcome them and seven steps to send them out. For example, when they see guests coming from afar, they will naturally take the first three steps to meet them. When guests leave the store, except for seven steps, they all form the habit of watching them leave. Many times, guests will turn around and wave to them from far away.