another source was a cadet branch of the ruling house of mi () of the state of chu during the spring and autumn period. among these pans, pan chong served as regent and advisor for the state of chu. when king cheng of chu decided to make a younger son the crown prince, pan chong aided the elder prince shangchen instead. shangchen forced king cheng to commit suicide and ascended the throne as king mu of chu. pan chong was made the "royal tutor".