Challenge: Xiangqi: Black Rook's Lateral Move, Red Cannon's Threat - Core Strategy - Can you solve it?

Black Rook moves horizontally across the 10th rank to block Red Cannon's advance. Red Rook blocks the 10th rank at the 5th file, while Red Horse threatens to attack Black General at the 4th file on the 9th rank. Black Cannon is pinned at the 7th file on the 9th rank, and Black Pawns at the 4th and 6th files on the 2nd rank form a double-horse formation. Learn to analyze this position like a professional.