The difference between Wyeth Qifu and Wyeth Zhenlang. Wyeth Qifu and Wyeth Zhenlang are both infant milk powder brands owned by Wyeth Company. Their positioning, functions and prices are different. Let\’s compare them in detail from four aspects. The ingredient formulas of Wyeth Qifu and Wyeth Zhenlang are quite different. Qifu milk powder is suitable for babies from 0 to 12 months after birth. The ingredients of the products at different stages are different. The high-end products contain the three-brain golden formula DHA, AHA and NA.