China Biologic Products Holdings, Inc., PW Medtech Group Limited (“PWM”) and Biomedical Treasure Limited (“Biomedical Treasure”) entered into an assignment and amendment agreement (the “PWM IRA Assignment Agreement”) on October 26, 2020 for PWM to assign its rights and obligations under the investor rights agreement between the Company and PWM to Biomedical Treasure in connection with the sale by PWM to Biomedical Treasure of 3,750,000 ordinary shares Shaof the Company (the “PWM re Sale”). Under the PWM IRA Assignment Agreement, PWM agreed to cause Ms. Yue’e Zhang to resign as a director from the board of directors of the Company with effect from the closing of the PWM Share Sale. On January 6, 2021, the PWM Share Sale was consummated and Ms. Yue’e Zhang delivered her resignation letter to the board of directors of the Company, effective immediately.