Place names of administrative divisions above the county level cannot be used as trademarks. However, place names with special meanings or registered trademarks are excluded.
Trademark Law
Article 10 The following signs shall not be used as trademarks:
Place names of administrative divisions at or above the county level or foreign place names known to the public shall not be used as trademarks . However, exceptions are made where place names have other meanings or are part of collective trademarks or certification marks; registered trademarks using place names will continue to be valid.