I Found Four Nuclear Submarines

 "As expected. They were already occupying such a high position of power. They had money, women, authority, and everything in between. How could they bear to throw their lives away just to perish with others? Just before pressing the button to release the nuclear weapons and unleash the destructive war, would they have left a way out for themselves?"

Obviously, the way out that the upper echelons of the Red Empire had left for themselves was in this spaceship named "The Permanent Number of Truth." No matter how hard Chen Jin thought, he just could not understand how it was possible for the bigwigs who had money, women, and power to do something like perishing together in mutual destruction rather than enjoying their luxurious lifestyle. If others were in their shoes, they would have chosen to sacrifice their mobility rather than carry out such an extreme plan. The existence of "The Permanent Number of Truth" had eliminated the suspicions that Chen Jin had.