Who influenced Zhao Meng's thought of returning to the Wei and Jin Dynasties and changing the calligraphy law?

Tracing back to Zhao Meng's return to the Wei and Jin Dynasties, the thought of changing calligraphy laws should originate from Song Gaozong. He is a descendant of the Song Dynasty, and calligraphy was also started by Gao Zong, which was deeply influenced in theory and practice. Xi Gaozong was limited by the situation in the Southern Song Dynasty and failed to carry forward.