Because Cheng Xin left 5 kilograms of matter, suggesting that the universe could not be restarted, the Virgin destroyed the universe, and the god of death lived forever. This is the ultimate philosophy that Three-body finally conveys to people. There is no clear answer in the book whether the third part of "Three-body" was restarted successfully. The opening is the ending for readers to think for themselves.
Related plot
In 409 AD, Guan Yifan was found in DX3906, which became the real darkness of the universe. Because of the spread of the dead line, Cheng Xin and Guan Yifan entered the dark area with low light speed. Twelve days later, Guan Yifan started the neuron control system suitable for low light speed, and finally landed successfully. Ten million years have passed.
I found Ai Ai's last words more than 20 meters underground and learned that she and Yun lived a happy life. He Yifan entered the small universe No.647 sent by Yun and found Naoko in the small universe. The universe is big, and life is bigger. In the life of a small universe, she wrote a memoir, Past beyond Time.
Billions of years later, the small universe was declared to be established by the return movement of the zeroers. Cheng Xin responded to the call and returned to quality, but left five kilograms of ecological balls in the small universe. ...