The First Emperor had many sons, but his helpers Li Si and Zhao Gao tricked the one he liked into killing himself. That way, a younger son became the Second Emperor and Li Si and Zhao Gao was able to be the true rulers for a while. The time when the First Emperor's family ruled China is named the Qin Dynasty, but it was very short. After the Qin, there was fighting that accidentally burned all the old books placed in the First Emperor's library. Then, there was more fighting before Liu Bei came out on top and got to be the new ruler of China. His family was named the Han Dynasty.