先生们/女士们：
Ladies and gentlemen:

由于公司业务拓展需要，我司原总部上海市浦东陆家嘴环路958号华能联合大厦22楼将于2017年4月20日迁往新址办公。
As a result of the company’s business development, our original headquarters in Shanghai, Lujiazui, 958 Ring Road, Pudong Huaneng The Union Buildings, 22F will be moved to the new office on April 20, 2017.
新地址请见附件，期待与您保持持续的良好合作关系！
Please check the attachment for the new address and look forward to maintaining a good relationship with you!

商祺！
Thank you & Best Regards