What do you mean by "two kings" in the history of calligraphy?

Wang Xi and Wang Xianzhi combined.

Wang Xizhi (about 32 1-379) is a great calligrapher, with few words and his nickname Lian Zhai. He is frank and informal, and he has never worshipped Li Rong since he was a child. He was revered as a book saint by later generations. Linyi (now Linyi, Shandong) in the Eastern Jin Dynasty lived in Yin Shan, Huiji (Shaoxing, Zhejiang). Due to the unknown records, the date of birth and death is still 303-36 1 year. The officers of the right army generals will review the internal history and be called "Wang Youjun". The calligraphy masterpiece Preface to Lanting has a long history and far-reaching influence.

Dedication, Chinese character, Han nationality, calligrapher and poet, ancestral home in Linyi, Shandong Province, born in Huiji (now Shaoxing), the seventh son of Wang Xizhi. He was 43 when he died. It is famous for its running script and cursive script. Wang Xianzhi studied calligraphy with his father Xi as a child, and also studied Zhang Zhi. Calligraphy is excellent, especially cursive script, which dares to innovate and has made outstanding contributions to modern calligraphy and cursive script since Wei and Jin Dynasties. Known as a "little saint" in the history of calligraphy, he is also called "two kings" with his father.