What was the calligraphy style in the early Tang Dynasty?

At the beginning of the Tang Dynasty, the national strength was strong, and calligraphy took off from the legacy of the Six Dynasties. Everyone took Ou Yangxun as a regular script. Yu Shinan Chu Suiliang, Xue Ji and Ouyang Tong are the mainstream of calligraphy. The general feature is that the structure is rigorous and tidy, so the essays of later generations are said to be "heavy in the Tang Dynasty" and were once honored as "the crown of calligraphy". The art of calligraphy in the early Tang Dynasty was based on inheritance, respecting statutes and deliberately pursuing the beauty of calligraphy in the Jin Dynasty. Regular script is the mainstream, and the general feature is a strict arrangement structure.