So a lot of major philosophical underpinnings of even modern China start to emerge in this time. Now, at the latter half of the Eastern Zhou period, you have the Warring States period, and that's where you see these dotted lines, and the Zhou Dynasty, which was already very decentralized, becomes even more fragmented, and China really doesn't get well unified again until 221 BCE. In 221 BCE, you have the emergence of the Qin Dynasty, and even though the Qin Dynasty is very short-lived, it only lasts a few decades, it's significant in that it's the first really strong central dynasty. It's often referred to as the first imperial dynasty. As we mentioned about the Zhous, very decentralized, this feudal system, but the Qin Dynasty under Qin Shi Huang Di, or sometimes Qin Shi Huang, he is a very strong ruler. He sets up this legalistic government, very strict legal codes. He really oppressed his opponents in significant ways, but the byproduct of that is he was able to really unify China.