Si Huiguo, a native of Dalian, Liaoning Province, was born in 1959. Chairman of calligraphers of China Hard Pen Society. Won the title of Top Ten Outstanding Persons and entered the Calligraphy Encyclopedia of Hard Pen Club! Si Huiguo is a running script calligraphy, and he wrote it in running script (ancient and modern famous pen copybook)!
The picture below shows the calligrapher's hard pen calligraphy.
(The picture is taken from the Library of Rational Professional Writers.)