Where are the maps of Qi, Chu, Yan, Han, Zhao, Wei and Qin?

Qin State: most of present-day Shaanxi, eastern Gansu, and a small part of Inner Mongolia; Qi State: most of present-day Shandong, southeastern Hebei, northern Jiangsu, and a small part of Henan; Chu State: most of present-day Hubei and Hunan , Anhui, Jiangxi, Jiangsu, Zhejiang, and southern Henan; Yan State: today's northern Hebei, western Liaoning, and a small part of Inner Mongolia; Zhao State: most of today's Shanxi, central and western Hebei, and parts of Inner Mongolia; Wei State: most of today's Henan, Southeastern Shanxi; South Korea: present-day central Henan and southwestern Shanxi.

Qi, Chu, Yan, Han, Zhao, Wei and Qin refer to Qi, Chu, Yan, Han, Zhao, Wei and Qin. These are the seven most powerful vassal states during the Warring States Period and are known as "Seven Heroes of the Warring States Period". After the wars for hegemony during the Spring and Autumn Period, the number of vassal states within the Zhou Dynasty was greatly reduced. The vassal states attacked each other and wars continued. After the three kingdoms were divided into the Jin Dynasty, Zhao, Wei, and Han became among the powerful states, and the Tian family replaced Qi. The pattern of the Seven Heroes of the Warring States Period was thus formed.

In the early Warring States period, Qin and Yan were weak, and the more powerful were Jin, Qi, Chu, and Yue. Among them, the Jin Kingdom experienced the annexation among the six ministers, and in 453 BC, a situation was formed in which Zhao, Wei, and Han were "divided into Jin" and "the four ministers were destroyed", which was known as the "Three Jins". In the middle period of the Warring States Period, the seven kingdoms of Qin, Qi, Chu, Zhao, Wei, Han, and Yan gradually formed a vying for supremacy. At first, Wei was the strongest among the major powers, but it gradually declined under the attack of Qi and Qin who came from behind. In the last thirty years of the Warring States Period, the six kingdoms of Shandong were no longer able to compete with the Qin State. The Qin State continued to encroach on the six kingdoms' territories eastward. Later, King Qin Yingzheng destroyed the six kingdoms and achieved great unification.