1. The writing time is different: Wu Rangzhi Wujun's post was written from Xuanzong to Daizong in Tang Dynasty, while Song Wudi's post was official in Southern Song Dynasty.
2. Different writing styles: Wu Rangzhi wu jun's posts are elegant, especially cursive, which shows his calligraphy attainments. Song Wudi's writing style emphasizes regularity and structure, and pays attention to block letters and rigidity, which shows the characteristics of calligraphy in the Southern Song Dynasty.
3. Different occasions for application: Wu Rangzhi Wujun Post Station was mainly used to transmit culture and academics in ancient times, which was praised and respected by scholars in past dynasties and had far-reaching influence. Song Wudi's posts were made by the royal family in the Southern Song Dynasty, which mainly showed the cultural level and the development of calligraphy art in the Song Dynasty, and were mainly used as appreciation collections.
Although Wu Rangzhi's Wu Jun and Song Wudi are both masterpieces of China's calligraphy, there are significant differences in writing time, writing style and application occasions.