Among the humankind, there was a tradition that a small-scale meeting with the emperor would be held every five years, a large-scale meeting with the emperor would be held in every ten years, and a world-wide pilgrimage would be held every hundred years.
For the small-scale meeting with the emperor held every five years, all ‘earls’ and ‘marquis’ in Midland would have to go to Pu Ban City with offerings and meet the human emperor. For the large-scale meeting with the emperor held every ten years, all ‘earls’ and ‘marquis’ in Midland and the four wastelands would have to either come to Pu Ban City themselves or send emissaries to Pu Ban City to meet the human emperor.