I feel that Sha Yi finally forcibly created tears and changed the detonation method of the nuclear bomb, which can be completely without heroic sacrifice. Set up a timing device and wait for the astronaut to fly to a safe place before automatically exploding

I feel that Sha Yi finally forcibly created tears and changed the detonation method of the nuclear bomb, which can be completely without heroic sacrifice.

Isn't it okay to set up a timing device and wait for the astronauts to fly to a safe place and then automatically explode? What technology could solve more than a hundred years ago, this movie is thirty years later, and there should be more methods. But the most sacrificial method was used, although it looked quite tragic, but it was not reasonable.