It was unexpected that Su Tan'er had set up a Steel Armor underground of the High Platform. The Lieutenant Colonel, using Su Tan'er's identity, stayed close to Yan Fei, fully aware of the formidable defense of Dream Island's Armor, and knew that her Steel Armor could not penetrate the Guard Squad's Defensive Armor. Thus, her purpose was not to use the Steel Armor to kill Lu Pingping, but to deliberately send the Steel Armor to its death, to distract Yan Fei.
When Yan Fei thought he had driven away the powerful Old Man of the Mountains and destroyed the enemy's abandoned Steel Armor, believing he had achieved a complete victory today, thereby letting his guard down mentally, the Lieutenant Colonel hiding behind Yan Fei would strike suddenly, killing Yan Fei who was caught off guard.
