Challenge: Double Red Horse Trap: The 'Empty Cannon' Strategy and Warning for the Black General - Can you solve it?

When two Red Horses are positioned at file 6, rank 8, the Red Cannon at file 3, rank 5 sets an 'empty' trap at file 4, rank 6. The Black General must be cautious as if not prevented, the Black Chariot at file 5, rank 2 will be 'pierced' from behind.