When the Red Cannon on File 3, Rank 7 fires at the Black Pawn on File 5, Rank 9, the position suddenly plunges into darkness. The Black Chariot on File 4, Rank 8 unleashes a secret 'Retreat' move, forcing the Red General on File 6, Rank 1 to reconsider. Is this one of the most refined 'Empty Cannon' strategies in Xiangqi history?