During the period of 1984, J.Peter Steidlmayer summed up his successful experience in the securities and futures market for more than 30 years and founded a set of theories to analyze the price changes of the securities and futures market-market contour theory, also known as four-dimensional space. 1986 introduced this theory in the book Market and Market Logic co-authored by Steinmeier and Qi.

Qi is a professional speculator from the futures market. I once founded a financial magazine with my friends. Later, he studied four-dimensional analysis methods with Steinmeier and served as the dean of the School of Market Logic.