Han Zhongwu fled south with half a piece of jade in his arms. He used Khitan language to trick Khitan people into dying, but the traces of his hair made Song Jun look at him like a piece of rust that couldn't be wiped off. To the south was the Song Dynasty and to the north was the Liao Dynasty. He stood in the middle of the boundary river and found that neither bank recognized him. The other half of the broken jade was on a Khitan woman's body, and the fractures fit perfectly - when the two pieces were put together, he saw clearly that the word on it was not Chinese or Khitan, but "return".
