王粲
The Cao family from 184 to 220 was involved in the chaotic infighting between warlords, across various parts of China. In 220, Cao Pi founded the Wei, or Cao Wei dynasty (220 CE – 266 CE). with its capital at Luoyang, in northern China. Its name came from 213, when Cao Cao's feudal holdings were given the name Wei; historians often add the prefix Cao (曹, from Cao Cao's family name) to distinguish it from the other states in Chinese history also known as Wei. Twenty-four of Cao Cao's poems survive. Cao Cao and his son and successor to power, Cao Pi, were both noted as patrons of literature. Altogether the Cao family, especially Cao Cao's fourth son, Cao Zhi, in association with other poets helped to form the "Jian'an" style. Cao Zhi is also noted for his association with the dramatically composed and life-saving poem known as "The Quatrain of Seven Steps". Cao Pi wrote an essay "Seven Scholars of Jian'an" which was influential in the development of the "Jian'an" school of poetry. One of the poets patronized by Cao Cao and considered to be one of the "Seven Scholars of Jian'an" was Xu Gan (170–217). Another poet in this group was Wang Can (177–217).