We'll pick you up in three minutes.

Get into a narrow street and engage the enemy in an alley battle.
Find more cover, advance to the side door of the friendly building, find the first floor has been occupied by the enemy, destroy the enemy on the second floor, go to the second floor and rendezvous with friendly forces! "Hold your fire, my own men, we're coming up!" Come to the second floor, when a large number of enemies appear in the opposite courtyard and building, and the enemy is descending from the plane! You can use grenades to blast the planes down!