Xiangqi End Game Technique #2: Use King to assist on an attack

Xiangqi End Game Technique #2: 

Use King to assist on an attack

Red moves first.

As shown in Diagram 1, Black is threathering to checkmate with R7+2. If Red plays C2-8, of course can resolve the check, however this is a weak move. 

Black could launch his attack by deploying his horse and pawns. Black would has gained huge advantages if Red plays R2-8.

Then, what is the best move for Red?

Diagram 1

Red K5=6! This is an excellent move! Red is threathering tp checkmate by playing P6+1

Black A6+5, the only move for Black to prevent Red P6+1

Red C9+3! Another good move, Red still want to play P6+1 to checkmate Black.

Black A5+4, to stop Red' King assit on Pawn's attack.

Red P6=7, get ready for P7+1 checkmate.

Black A4-5, only move....

Black P7+1, A5-4, P7=6 checkmate. Diagram 2.

Diagram 2