 To save Xue Rengui, Yuchi Gong had conflicts with Li Daozong, and then, the emperor Li Shimin who believed in Li Daozong rather than Xue Rengui.After the judge announced that Xue Rengui would be sent to the death row, Yuchi Gong was so disappointed and angry.He hit the Zhijin Gate with his Bian to show his discontentment.