Mingatou was an outstanding scientist in Qing Dynasty. He made great contributions in the field of mathematics, not only creatively put forward the secant, but also discovered the Catalan number. The name Catalan number was put forward by the western mathematician Catalonia. In fact, Mingato was the earliest founder of Catalonia number. Mingatou began to learn advanced mathematics knowledge from the west in his early years. Through constant thinking and exploration, he finally found Catalan number in the application of trigonometric function. However, at that time, Mingatou did not systematically study and delve into this discovery, but it also opened the way for people to learn Catalan numbers.

Catalonia number was first discovered by Mingatu, a mathematician in Qing Dynasty in China, and also recorded in detail in Mingatu's related book Secant Circle Density Method. However, Mingatou's research is not very in-depth, but only stays in the superficial study of Catalan numbers, focusing on the geometric significance of Catalan numbers. In the process of studying combinatorial arithmetic, Mingatou gradually found that too many numbers were difficult to express by counting, so he creatively invented Catalan numbers characterized by trigonometric functions. Mingatou found that there are finite sequences and finite functions in Catalan numbers. He did a lot of research on this, but in the end he didn't get very convincing axioms and inferences, so that no one cared.