Challenge: Xiangqi: Strategy 'Black Chariot Retreat' - Secret to Defeating Red Cannon - Can you solve it?

When the Black Chariot faces the Red Cannon with both exposed on the 4th and 3rd ranks, a secret battle between the two forces begins. The Black Chariot can 'retreat' to create a double horse formation, but the Red Cannon can counterattack with an 'empty cannon.' Let's dissect this position in a master-disciple dialogue.