Challenge: Red General's Breakthrough: The Black's Resilient Strategy in the 'Black Chariot Siege' Formation - Can you solve it?

When the Red Chariot exposed two ranks on the 9th file, threatening a 'piercing' attack on the Black General, the Black Advisor exposed five ranks on the 9th file, creating a miraculous defensive formation. Let's analyze how Black neutralized the pressure and awaited counterattack opportunities in this formation.