Actually, it doesn't matter whether you hit TM or not. TM is the abbreviation of trademark. In the impression of Chinese people, TM is a trademark being applied for and R is a registered trademark.

In fact, even if you register, you can still call TM or not.

Trademarks are actually created to protect your products and intellectual property rights from being infringed by others. If you are registered and don't mark R, others can't say that your trademark is illegal.