The emperor goes on a tour of the palace. The crown prince is ordered to take care of the affairs of state. The dance begins. It is the period of "gu yu" or "grain rain", a major astronomical term that begins on April 20 and ends on May 5. According to the east asian calendars, each year is divided into 24 lunar terms. Each point is used by the lunisolar calendar to stay synchronized with the seasons. The emperor asks the crown prince to allow him to bring some rare birds and beasts into the palace as a tribute. The birds and animals also have parents, siblings, and they are forbidden to be separated from their families. He tells the prince that he wants to give the royal aviary treatment. The prince tells him not to be afraid. He wants to help the bird. He asks the prince not to look down on him. He says that he is just a