I have heard the following account: When the King of Liang came west to court and visited Empress Dowager Dou for a private audience, he and Emperor Jing sat together attending the Empress Dowager. They spoke intimately. The Empress Dowager said to the Emperor: "I have heard that the Way of Yin favored closeness of kin, and the Way of Zhou favored reverence for rank — but the principle is one. Let the royal carriage and the grand equipage rest with King Xiao of Liang as my trust." Emperor Jing rose on his mat and said: "Agreed."
After the drinking ended and they withdrew, the Emperor summoned Yuan Ang and other great ministers versed in the classics: "The Empress Dowager spoke thus — what does she mean?" They all replied: "The Empress Dowager intends to make the King of Liang the imperial heir." The Emperor asked for their analysis. Yuan Ang and others said: "The Yin Way of favoring kin means installing a brother. The Zhou Way of favoring rank means installing a son. The Yin Way was plain and modeled on Heaven — it favors those who are close, hence installs a brother. The Zhou Way was refined and modeled on Earth — reverence means respecting origins, hence installs the eldest son. Under Zhou practice, if the crown prince dies, the legitimate grandson succeeds. Under Yin practice, the brother succeeds."
The Emperor asked: "In your judgment, which applies?" They all replied: "Han currently follows Zhou. Under Zhou law one cannot install a brother — one must install a son. This is precisely why the Spring and Autumn Annals criticizes Duke Xuan of Song. Duke Xuan died and passed the state to his brother instead of his son. When the brother died, he returned it to the elder brother's son. The brother's son contested this, claiming he should succeed his own father, and assassinated the brother's nephew. The state fell into chaos and the disasters continued for five generations. Hence the Spring and Autumn Annals says: 'The noble man values adherence to the correct. Song's misfortunes were Duke Xuan's making.' Let us see the Empress Dowager and explain this."
Yuan Ang and the others went in to see the Empress Dowager: "Your Majesty wishes to install the King of Liang. When the King of Liang dies, whom will you install then?" The Empress Dowager said: "I will install the Emperor's son again." Yuan Ang and the others reported the case of Duke Xuan of Song, whose failure to install the rightful heir produced disasters lasting five generations — showing that small indulgence harms the greater principle. The Empress Dowager understood and relented, immediately sending the King of Liang back to his kingdom.
But the King of Liang learned that the argument had originated with Yuan Ang and the other ministers. He harbored a grievance and sent men to kill Yuan Ang. When the assassin struck, Yuan Ang turned and said: "I am the one called General Yuan — are you sure you have the right man?" The assassin said: "You are the one!" He stabbed him and left his sword in the body.
Examining the sword, it was newly polished. Inquiries among the sword-grinders of Chang'an produced a craftsman who said: "A certain young gentleman from Liang brought this sword to be polished." From this the connection was discovered, and envoys were sent to pursue the matter. In all, the King of Liang had wanted to assassinate over ten senior officials. The investigating clerks traced the conspiracy to its root, and clear evidence of a treasonous plot emerged.
The Empress Dowager refused to eat and wept day and night without stopping. Emperor Jing was deeply worried and consulted the ministers. The ministers advised sending officials versed in the classics to handle the investigation, as only such men could resolve the situation. Tian Shu and Lü Jizhu were dispatched. Both were learned in the classics and understood the great rites. On their return, they stopped at the post station at Bachang, set fire to all the documentary evidence of Liang's treasonous statements, and came before Emperor Jing empty-handed.
The Emperor asked: "What is the verdict?" They replied: "The King of Liang knew nothing of it. The perpetrators were solely his favored ministers Yang Sheng, Gongsun Gui, and their associates. They have been duly executed. The King of Liang is unharmed." Emperor Jing was delighted: "Go at once and report to the Empress Dowager." When the Empress Dowager heard, she immediately sat up, ate a meal, and her spirits were restored.
Hence it is said: Those who master the classics and understand the great rites of past and present are fit to serve as one of the Three Excellencies or as a close attendant of the ruler. Men of narrow experience are like those who peer at heaven through a tube.