Jumping from an altitude of 3800 meters and then maintaining free fall for over 50 seconds, Ren He had known for a long time this mission was a deep pit. If he rashly started the mission, he would inevitably meet a bloody disaster...
Now, being able to unexpectedly discover a pit with a negative altitude of 579 meters was absolutely the best place to complete the mission.
But once Ren He calculated carefully, it still wasn't right; an altitude of 579 meters wasn't enough time! If he had to free fall for over 50 seconds, it meant that Ren He's parachute opening time had to be just as he plunged into the pit; otherwise, there still wouldn't be enough time for free fall!
Ren He inhaled sharply. After entering the pit, he would have only 500 meters left to deploy his parachute? This was truly a life-threatening gamble! Normally, the minimum safe height for a parachute jump from an airplane is 500 meters!