Gu Wenyi’s hollow bold calligraphy
Hollow calligraphy is also known as double hook calligraphy. Double hook calligraphy The "five-finger method" of double hook calligraphy (double bract) Double hook, also called "double bract", is a method of writing.
Writing hollow characters is somewhat similar to the Chinese colorful clouds in the font, but it pays more attention to the techniques and rules of calligraphy itself.