Challenge: The 'Red Cannon Empty' Formation - Defensive Strategy from the Ancient Battle of Bạch Đằng - Can you solve it?

Analyzing the Xiangqi formation with the Red Cannon on file 6, rank 3 forming an 'Empty' - an ancient tactic used in the Battle of Bạch Đằng. The Black Chariot on file 4, rank 7 and the Black Horse on file 6, rank 4 form a 'Double Horse Interlock', threatening a direct attack. The counterplay involves the Red Advisor on file 5, rank 2 and the Red Elephant on file 3, rank 1.