In which historical period did the historical celebrity Cai Xiang live?

The historical celebrity Cai Xiang lived in the Northern Song Dynasty. Cai Xiang was born in Jiaoxi Village, Chihu, Fengting Town, Xianyou County, Xinghua County, Fujian Road, on February 12, the fifth year of Dazhong Xiangfu (March 7, 1012), the fifth year of Dazhong Xiangfu, Emperor Zhenzong of the Song Dynasty. He died in the fourth year of Zhiping (1067). Year).

Cai Xiang was an official, calligrapher and tea expert in the Northern Song Dynasty. He is particularly good at calligraphy. He can be said to have pioneered new styles such as those of Su Shi, Huang Tingjian, and Mi Fu, and connected the calligraphy styles of the Tang and Song dynasties. Later generations, together with Su Shi, Huang Tingjian and Mi Fu, were called the "Four Schools of Song Dynasty".