Whose book is Shuang Yan's?

Shuang Yan's book refers to the author Mi Nanyang, and Shuang Yan's book is a handwriting font of brush calligraphy that appeared on the Internet in April of 201/year. An article named "The Book of Double Brilliance" was rated as "the most potential plagiarized font" by netizens, and the author Mi Nanyang was called "the most capable calligrapher in China".