In the field of intellectual property prosecution, Nana Zhang and her team at Chang Tsi & Partners have become a solid support for numerous multinational companies in China and surrounding regions, thanks to their exceptional professional skills and extensive practical experience. Nana Zhang graduated from George Washington University with a Master of Laws in Intellectual Property and has been specializing in intellectual property rights since 2008. Leading a team of nearly 20 professionals, she has amassed rich experience in trademark portfolio management, trademark evaluation, searches, filings, oppositions, invalidations, and cancellations, and has also shown outstanding performance in copyright registration and copyright claims in related conflict cases.