Challenge: Miraculous Counterattack Defense: Black Rook at 6-4 Blocks Red Rook at 1-2 - Can you solve it?

A mysterious formation in Chinese Chess where the Black Rook at 6-4 becomes an impenetrable wall, preventing the Red Rook at 1-2 from advancing. Analyze how the Red General exploits the gap to reverse the tide in a level 1/10 match.