July 29, 2013
Board of Directors
CAM Group, Inc.
Jixing Building, 151 Shengli Avenue North
Shijiazhuang, Hebei Province
P.R. China
Re: Resignation asPresident, director and Secretary
Dear Board of Directors:
Please be advised that I, Weiheng Cai, do hereby resign from the positionPresident, director and Secretary of CAM Group, Inc. (f/k/a RT Technologies, Inc.) (the "Company"). This is a decision I have to take due to the business development in Southeast Asia region and China recently that will require me all time and effort. This resignation is effective immediately.
I am resigning in order to allow for the appointment of Ms. Ka Kit who is competence to the position ofPresident and Secretary and not due to any disagreement on any matter relating to the operations, policies, or practices of the Company.
Very truly yours,
_____________________
Weiheng Cai