[2] Gao is alternatively said to have originally studied with Song Changrong (宋長榮) or Yin Fu, later (or alternatively previously) studying with one of Cheng's students, Zhou Yuxiang (周玉祥).
[2] Essentially, Gao Style Bagua is a unique subsystem.
He changed his straight line, pre-heaven and weapons sets more than once in his life but at its core it is a complete Baguazhang system.
Gao style explicitly divides training into two categories: pre-heaven (先天) and post-heaven (後天).
Post-heaven training consists of 64 linear palms (六十四掌) is said by Gao Yisheng to be passed down by a man known as Song Yiren (宋益仁) (i.e., Song Yiren (送藝人), or "person who gives arts"); these palms are unique to the Gao system.