What was the situation of calligraphy in the middle and late Yuan Dynasty?

After entering the mid-Yuan Dynasty, the calligraphy style changed from the Southern Song Dynasty and the Jin Dynasty to the Yuan Dynasty, forming a unique style of the Yuan Dynasty. During this period, not only Zhao Mengfu's calligraphy continued to be popular in the ruling and opposition parties, but also a group of Zhao calligraphers formed around him, who were inextricably linked with Zhao Mengfu. Among them are Huang, Yu Ji, Guo Bi, Liu Guan, Qian Liangyou, Zhu Derun, Ke, Xie Si, Kang Lizishan and Zhang. Students of the student generation, such as Rao Jie and Su Wei, disciples of Kanglizishan; Relatives are: brother Zhao Mengfu, wife Guan Daosheng, son Zhao Yong, nephew Wang Meng, etc.