Tian Wenhua , former Sanlu chairwoman and general manager , pleads guilty . Chinese investigators found melamine in nearly 70 milk products from more than 20 companies , according to quality control official Li Changjiang , who was eventually forced to resign . Four Sanlu executives accused of producing and selling substandard products . - January 2011 : The Chinese government announces a new policy to regulate the sale of baby formula in China. Victims of tainted baby formula to be compensated by 22 Chinese dairy firms .
Tian Wenhua , former Sanlu chairwoman and general manager , pleads guilty . Four Sanlu executives accused of producing and selling substandard products . - January 2011 : The Chinese government announces a new policy to regulate the sale of baby formula in China. Victims of tainted baby formula to be compensated by 22 Chinese dairy firms .