convinced the King of Qin that he too needed to fast for five days, after which, "your servant would dare to offer up the jade." The king agreed, and while he was fasting, Xiangru arranged for his retainer to disguise himself as a commoner, conceal the jade, and safely smuggle it back to Zhao. After the King of Qin had finished fasting and purification, he held a ritual ceremony in his court. When Lin Xiangru arrived, he confessed having secretly sent the jade back to Zhao and then insulted the king's ancestors: "Out of the twenty odd lords of Qin since Duke Mu 穆 (r. 659-621 B.C.), not one has honored his agreements and oaths. Your servant truly feared he would be cheated by Your Majesty and thus betray Zhao." Xiangru told the enraged king that he would willingly accept the Qin death penalty for deceiving a king, and requested the pēng (烹, "death by boiling") punishment. Although some of the courtiers wanted to boil Xiangru immediately, the King of Qin said, "If We kill Xiangru now, We still cannot acquire the jade, and it would ruin the good relations between Qin and Zhao. It would be better to treat him with great civility instead, then send him back to Zhao." After Xiangru had returned, the King of Zhao praised the skillful diplomacy of his mission to Qin, and appointed him Senior Grand Master. (Chapter 81) This story is the source of the Chinese idioms jiàzhíliánchéng (價值連城, lit. "as valuable as multiple cites") meaning "invaluable; priceless" and wánbìguīzhào (完璧歸趙, lit. "return the whole jade-disk to Zhao") meaning "to return something intact to its rightful owner". Li Si The Shiji biography of Qin dynasty Grand chancellor Li Si (c. 280-208 BCE) collectively mentions Sui He zhi bao (隨和之寶, "treasures of [Marquis] Sui and [Mr.] He") in a letter advising Emperor Qin Shi Huang not to follow Zheng Guo's advice to expel all foreigners from Qin. Now Your Majesty imports jade from the Kun Mountains and possesses the treasures of Sui and He [隨和之寶]. Dangling moon-bright pearls [明月之珠], you buckle on the sword Taia, are drawn by fine steeds like Xianli, set up phoenix banners blazoned with kingfisher feathers, and employ drums of sacred lizard skin. Not one of these various precious things is a product native to Qin, and yet Your Majesty takes joy in them. Why? If something must be