1, strict quality control: Yitong seven-piece set is a regular brand with a strict quality control system to ensure that the composition and content of the product meet the national and regional regulations and standards.

2. Scientific formula design: The formula design of Yitong seven-piece set needs to consider many factors, such as the source of raw materials, the nature of ingredients, the rationality of ratio, etc. The brand will hire a professional formulator and R&D team to carry out scientific formula design according to the market demand and the skin characteristics of consumers to avoid adding unnecessary hormone components.