In the movie "She Disappeared", why didn't I know that Li Muzi couldn't live anyway!

Congratulations on disappearing! Her box office broke 3 billion! ! This play is really full of details! In the last scene, He Fei keeps Mu Zi in a cage. Even if Mu Zi escapes and there are jellyfish in the sea, Mu Zi can't live. He planned all this before.