The Title of This Book Is No Return to the Moon

With the border warring for years, military doctor Yun Niang rescued Xiao Chen, a seriously injured enemy general. During the careful care, the two understood and cherished each other across their attitudes. The war resumed, and Xiao Chen was forced to return to the battlefield. Before leaving, he put a warm jade into her hand: "This jade is called 'No Return'. If I die in battle, it will warm you for the rest of your life." She held the warm jade day and night and waited until the war was over. The warm jade is still hot, but it can't warm the eternal separation of the world.