What dynasty were Ou and Zhao Ge?

Ouyang Xiu, Liu Gongquan, Yan Zhenqing, Zhao Mengnai Ouyang Xiu (1007- 1073), also known as Uncle Yong, also known as drunkard, also known as Liu Yiju. Luling (now Shaxi, Yongfeng County). Liu Gongquan (778-865) was an outstanding writer and historian in the Northern Song Dynasty and the last famous calligrapher in the Tang Dynasty. He was born in Jing Zhao Jing Yuan (now Yao County, Shaanxi Province). Official to the prince, deceased people call it "Liu". Wang Xizhi began to learn calligraphy, and later visited famous calligraphers in the Tang Dynasty. He thought that Yan Zhenqing and his calligraphy were the best, so he absorbed the advantages of Yan and Europe and became a whole. Yan Zhenqing was an outstanding calligrapher and a great patriot in the middle Tang Dynasty. His "Yan Ti" regular script, together with Zhao Mengfu, Liu Gongquan and Ou Yangxun, is also called "the four masters of regular script". Also known as "strict care" with Liu Gongquan. Zhao Mengfu was a famous painter in Yuan Dynasty and one of the four masters of regular script (Ou Yangxun, Yan Zhenqing, Liu Gongquan and Zhao Mengfu). Zhao Mengfu is well-read, good at poetry and prose, familiar with economy, industrial calligraphy, fine painting, good at epigraphy, fluent in temperament and appreciation. In particular, calligraphy and painting achieved the highest achievements in the Yuan Dynasty, creating a new style of painting, which was called "the crown of Yuan people". Good at seal cutting, official script, authentic works, calligraphy and cursive script, especially regular script and running script.