(4). 3) Suddenly, a sharp alarm sounded.

In a surprise, he said to himself, "Come on, this is great. The security defense system of State J is so powerful that even the invisible function of Flying Mushroom can be deciphered."

It turned out that the alarm came not only from the defense system outside, but also from the defense system of flying mushrooms.

He busily turned on the flying mushroom defense controller, and an alarm came from the computer: "The ground defense system has the function of life detection, defense height: 36 meters to 200 meters in the field. You can choose to lower the flight altitude or raise the...