By the time of the Warring States period of the 5th–3rd centuries after the state of Qin conquered the other six kingdoms and established the first unified Chinese state.
King Zheng of Qin proclaimed himself the First Emperor of the Qin dynasty.
The Sui restored the Han to power through China, reformed its agriculture and economy, constructed the Grand Canal, and patronized Buddhism.
In 907, the Tang disintegrated completely when the local military governors became ungovernable.
The Song Dynasty ended the separatist situation in 960, leading to a balance of power between the Song and Khitan Liao.
The remnants of the Song retreated to southern China.
The 13th century brought the Mongol conquest of China.
The Han expanded the empire's territory considerably, with military campaigns reaching Central Asia, Mongolia, South Korea, and Yunnan, and the recovery of Guangdong and northern Vietnam from Nanyue.
Han involvement in Central Asia and Sogdia helped establish the land route of the Silk Road, replacing the earlier path over the Himalayas to India.China is also a member of numerous formal and informal multilateral organizations, including the WTO, APEC, BRICS, the Shanghai Cooperation Organization (SCO), the BCIM and the G20.China is a great power and a major regional power within Asia, and has been characterized as a potential superpower.whose central figures were later immortalized in one of the Four Classics of Chinese literature.At its end, Wei was swiftly overthrown by the Jin dynasty.The Song was the first government in world history to issue paper money and the first Chinese polity to establish a permanent standing navy which was supported by the developed shipbuilding industry along with the sea trade.