An old story has it that in the Tsin dynasty, Gen. Lu Chi's soldiers were rescued from a mountain siege by a dog called Huang Er (Yellow Ear), which ran to bring help.
晉朝大將陸機被敵軍團團圍困在山上，人馬無法突出重圍。在無計可施的情況下，一隻名叫「黃耳」的狗，受命突圍求援，結果不負所望達成任務。