What is the end point of the three-body countdown?

The end of the three-body countdown is actually nothing. In Wang Miao's eyes, the countdown has no practical use, just psychologically intimidating him.

In order to drive Wang Miao crazy, the trio uses Naoko to move at a high speed on Wang Miao's retina, because the trio is afraid of the development of nanotechnology in Wang Miao and prevents the trio from invading the earth (weaving a nano protective cover outside the earth). When Naoko saw Wang Miao turn off the nano-machine, Naoko would leave Wang Miao because Naoko realized that Wang Miao was no threat to the trio.

Wang Miao's threat lies in human flight.

Fear of Wang Miao is not the same as fear of Luo Ji. Wang Miao's threat to Santi may lead to human flight, while Luigi's threat to Santi will directly lead to the destruction of Santi's civilization.

Wang Miao's threat is that people fled because Wang Miao studied nano-materials, which can be used to build space elevators and starships. Space elevators can allow large-scale human beings to enter space, but once they enter space, it is possible to escape on a large scale. Three-body people are afraid of humans. The opacity of human thinking and the accelerated progress of science and technology are a great threat to Santi people. Once they escape into space, they can't control it. When they escape to human technology, they will make a comeback.

However, escapism is difficult to realize in human society, because it is impossible for all human beings to escape, and some human beings will cause unrest. Therefore, escapism was outlawed in three body 2, and Wang Miao no longer appeared.