Challenge: Xiangqi: 'Black Cannon Empty Chest' - A Defensive Symphony - Can you solve it?

When the Black Cannon is exposed on File 4, Rank 9, and the Red Pawns are positioned on File 6, Rank 7 and File 5, Rank 5 like two companions, they launch a coordinated 'Open File 6' to create a breathtaking defensive symphony. This formation is not only a harmonious interplay of pieces but also a lesson in patience and strategic calculation.