Multiple Zeta Values are iterated integrals on a three-point $(0, 1, \infty)$ punctured projective line. In our awarded article, we considered iterated integrals on a four-point $(0, 1, \infty, z)$ punctured projective line. The main difference between the four-point version and the MZVs is that the former has a free complex variable “z”, for which the iterated integrals satisfy a system of differential equations. The confluence relation is the relations constructed via re-integrating the derivatives of iterated integrals using the fundamental theorem of calculus. This simple construction turned out to be a powerful method of studying the relations among MZVs, and we proved that the well-known regularized double shuffle relations and the duality relations are both consequences of the confluence relations. These are the main contents of the awarded article. In the talk, we would also like to discuss some subsequent works after the awarded article. Firstly, the confluence relations can also be reformulated by the language of generating functions and Furusho proved that they are equivalent to the pentagon equation of the KZ-associators. Also, due to the simplicity of the idea, we further generalized the idea of confluence relations to more general iterated integrals, and in particular, gave a complete description of the relations among motivic alternating multiple zeta values.