Level 1: The background of Yili milk powder authenticity inquiry 1. Introduction to Yili milk powder brand 2. The background of Yili milk powder authenticity inquiry 3. The importance of Yili milk powder authenticity inquiry 4. The method of Yili milk powder authenticity inquiry In the market, Yili It is a very well-known dairy brand. The products it produces and sells include milk, yogurt, milk drinks and infant formula. Among them, Yili infant formula milk powder is one of the products that attracts much attention from consumers. However, as market competition intensifies, some unscrupulous merchants begin to sell