Challenge: Xiangqi: The Black Heart Trap - Red Cannon Exposed on the 10th File, 3 Ranks, Kills the Black General - Can you solve it?

A classic formation where the Red Cannon is exposed on the 10th file, 3 ranks, but if not carefully observed, it falls into a deadly trap. Experts decode the secrets of the Black General's exposure on the 5th file, 9 ranks and the absolute defense method.