Mary Zhang, the sales representative of GDITC Trading Co., Ltd (152 Xingang Road West, Haizhu Distict, Guangzhou, China), resigns in December 31, 2011. Lind Wang will be the new sales representative and her e-mail: lindawang@gditc.com.cn. Suppose you are the secretary of the company, please draft a letter to inform all your clients about this on behalf of the CEO Peter Chen. You can choose a layout format you preferred.