Briefly summarize the calligraphy characteristics of Wang Xizhi, Chu Suiliang and Ou Yangxun. .

Wang Xizhi's greatest achievement is to increase and destroy the ancient law and turn the simple calligraphy style of Han and Wei dynasties into exquisite and beautiful calligraphy style. The cursive script is thick and slim, the official script is smart and dense, and the running script is vigorous and natural.

Chu Suiliang's calligraphy was a beginner in the south of the city. In his later years, he studied under Zhong You and Wang Xizhi, and merged with Han Li to form his own family. Together with Ou Yangxun, Yu Shinan and Xue Ji, they are called the four great calligraphers in the early Tang Dynasty. According to legend, after Yu Shinan's death, Emperor Taizong sighed that no one could discuss books. Wei Zhi praised: "Chu Suiliang's efforts won Wang Yi a reputation." Wei Zhi believes that he has a deep understanding of Wang Zi and has the ability to identify the authenticity of Wang Zi.

Ou Yangxun is known as the first regular script in Tang Dynasty for his rigorous brushwork and precipitous brushwork. He and Yu Shinan were both famous for their calligraphy in the early Tang Dynasty, also known as "Ou Yu". Later generations saw the danger in the book, and they were the first to understand it. The name is "Oti".