Xiexian Pai 斜体派(slant style) is a word by image of the cursive script by Japanese researchers. I think “ Cai Shu Pai” 草書派is better for Cursive system. There are two thoughts, one is Geometric and the other is Script for designing shorthand letters. In other words, shorthand strokes and signs should be taught in dynamic style, or in intermind symbol.
Yan Tingchao learned Geometric system at first, and then studied Russian Cursive system.
He invented first Chinese Cursive system in 1951, referred GESS(Sokolov).
There was took co-work with Mr.Tang Yawei in 1952 in Cursive system by him.
Yan Tingchao enthusiastically applied Cursive theory into Hungle and Japanese in 1954, 1984.
He wrote China Shorthand History of Development, and wrote other many academic jobs.
My very honorable Mr.Yan Tingchao　, he passed away last December, Yang Tingchao ,rest in peace please !