legal analysis: the "TM" mark may not be used, but most people will use it in order to better safeguard the trademark right in the future.
Legal basis: Trademark Law of the People's Republic of China
Article 4 If a natural person, legal person or other organization needs to obtain the exclusive right to use a trademark for its goods or services in production and business activities, it shall apply to the Trademark Office for trademark registration. The provisions of this Law on commodity trademarks shall apply to service trademarks.
article 5 two or more natural persons, legal persons or other organizations may * * apply to the trademark office for registration of the same trademark, and * * * both enjoy and exercise the exclusive right to use the trademark.