Задача трёх тел

Countless thin lines stretched across the starry sky, like a giant brush. The Trisolaran fleet would arrive in 400 years. A distant butterfly flapped its wings, altering Luo Ji's fate; behind the door that swung open lay the world's center—the Wallfacer Project. Meanwhile, within the Wallbreaker chamber created by the Sophon, the Wallbreakers took their places one by one… (Source: Bilibili, translated)