The Emperor Phoenix of Time Travel

She is a clone living in a high-tech era. She doesn't even have a name, just a codename - 0. The meaning of her existence is to protect the original body and die in its place when necessary. Finally, at the age of nineteen, she completed her final mission and died in a murder instead of her original body. When she woke up again, she became the princess of Chen Kingdom. In other words, the former princess of Chen Kingdom and the current witch protecting the country. However, the truth is not as good as it sounds, because this princess is an idiot. A fool who was placed under house arrest in the cold palace but still died unexpectedly. How should she survive in the turbulent palace after being reborn? He was the crown prince of Mu State. After his uncle tried to usurp the throne, he became bad and was sent to Chen State as a hostage. After getting to know Liu Qingyi, he decided to go back to the mountains and forests, but the day before he left, he received an imperial decree ordering Liu Qingyi to go to Turks and marry... The world will be divided if it is united for a long time, and it will unite if it is divided for a long time. When heroes compete for the throne and wars rage, who can unify the world and achieve eternal hegemony?