Five people have their own styles and accomplishments, so it's hard to compete. If we must compare them, according to the evaluation of calligraphers and connoisseurs in past dynasties, Su Huangmi is a class, and Cai Xiang and Song Huizong are slightly inferior.
Song Huizong:
1. The original thin gold calligraphy is unparalleled in the world, and I believe that no one can surpass it until today. This thin gold calligraphy is tall and straight, beautiful, elegant and sharp. Even people who don't know calligraphy at all will feel excellent after reading it. Immortal calligraphy works in Shoujin style include Shoujin Thousand-character Works, Two Poems Borrowed from Wind and Frost, Summer Poems, and Zhang Postscript of Ou Yangxun Hanshu, etc. Since then, no one can reach his height for more than 800 years, and he can be called the first person in ancient and modern times.
Song Huizong's signature is very distinctive. It looks like a word "Tian", but the first stroke of the word "Tian" is a distance from the one below. It means "a man in the sun"
3. Song Huizong Evonne's "Thin Gold Book" is highly valued by calligraphers, and coins such as Chongning Daguan written in this font are collectors' favorite treasures. The Book History Society commented: "Hui Zong's cursive brushwork is correct, vigorous and free and easy. He is a beginner in learning discipline, changing his statutes, calling himself a thin book, and being natural with his heart. " His paintings attach great importance to sketching, especially flower-and-bird paintings, and attach great importance to details, so they are famous for their accuracy and realism.