Mi Youren, the author of Yunshan Moxi, was a painter in which period?

Mi Youren, the eldest son of Mi Fei, a painter in the Northern Song Dynasty, was deeply appreciated by Song Gaozong. He inherited and developed Mi Fei's gardening techniques, and laid a special performance of "Mi's Yunshan", which is famous for its misty landscape after rain. His father and son are called Daiwa Xiaomi. In his early years, he was famous for his calligraphy and painting. In the fourth year of Xuanhe in the Northern Song Dynasty (1 122), calligraphers should be selected. After crossing the south, he won the favor of assistant minister of the Ministry of War and Fu Xueshi. Emperor Gaozong Zhao Gou ordered him to appraise calligraphy. However, for the identification of calligraphy and painting, "it is often temporary to cater to the above." Although I can't catch up with my father, meticulous calligraphy and Xie's children all have their own styles.