A unique formation with the Red Chariot on file 5, rank 8 attacking and retreating the Black General on file 4, rank 10, creating a situation of 'hitting wood' but opening a path for the Red Cannon on file 7, rank 6 to 'fire an empty cannon' at the Black Pawn on file 5, rank 2. Analysis of tactics based on classical military strategy and modern Xiangqi theory.