Challenge: Red General's Breakthrough: Decoding the Rook-Cannon Straight-4 Strategy - Can you solve it?

The Xiangqi formation is tense when the Black General is pinned on the 5th rank. The Red Rook on the 3rd rank and the Red Cannon on the 4th rank coordinate a 'Rook Charge - Cannon Shot' to force the Black General into a dangerous retreat. The defense strategies of the Black Horse on the 2nd rank and the Black Pawn on the 3rd rank are analyzed in detail.