After the battle , as a last defiant act against the invaders , Lu Xiufu embraced the eight - year - old emperor .
The pair leapt to their deaths from Mount Ya , thus marking the extinction of the Southern Song .
After the battle , as a last defiant act against the invaders , Lu Xiufu embraced the eight - year - old emperor and the pair leapt to their deaths from Mount Ya , thus marking the extinction of the Southern Song .