Is Huang Tingjian's Gao Songfu a fake?

no. Huang Tingjian was a writer and calligrapher in the Northern Song Dynasty, and his works were mainly poems and prose. Gao Songfu was a prose of Huang Tingjian, which described tall and straight pine trees and expressed the author's admiration for pine trees. This prose was widely praised in the history of literature and regarded as one of Huang Tingjian's representative works.