Phoebe Xi, the head of the Bio-Chemistry department at Chang Tsi & Partners. She ever had 3-year work experience as a researcher in a famous energy group in China, and then became a patent attorney in 2011. Her main technical fields include material, energy, and pharmaceutical, and her main clients include L’OREAL, Bostik, PFIZER, MACROGENICS, INC., Total, YiLi, BOE, RICH PRODUCTS CORPORATION, Morgan Advanced Material, Vitrias and Stemcell Technologies, etc.

For the Bio-Chemistry department, there are more than 10 team members, almost 80% of the patent attorneys have 10+ years of work experience, and all of them have master's degrees, some patent attorneys possess Doctor’s degrees, and some professionals sit two bars (both the law and the patent bar) in multiple jurisdictions. All of the patent attorneys can work in English and Chinese, and some of them are also good at Japanese or Korean.