The Board of Keystone Microtech Corporation approved to change spokesperson and acting spokesperson. Name, title, and resume of the previous position holder: Spokesperson: Anderson Peng, the Company's Vice President of Business. Acting spokesperson: Ren Zeng, the Company's director.

Name, title, and resume of the new position holder: Spokesperson: Ren Zeng, the Company's director. Acting spokesperson: Robin Huang, the Company's director. Effective date is March 7, 2022.

Reason for the change: position adjustment.