In China's stock market, listed companies are usually categorized into different segments to reflect their main business and characteristics. Tianhua Superclean is mainly involved in the following sectors:
1. Technology sector: Tianhua Superclean's anti-static ultra-clean technology products belong to the field of science and technology, so the company can be categorized into the technology sector.
2. Medical sector: Tianhua Superclean's medical device business makes the company involved in the medical sector as well.
3. New energy sector: Tianhua Superclean's lithium materials business is related to the new energy industry, so it can also be categorized as a new energy sector.
It should be noted that Tianhua's stock code is "SZ:300390", indicating that the company is listed on the Shanghai Stock Exchange (SSE). The specific categorization of different stock exchanges and boards may vary, so please refer to your local stock exchange's categorization and regulations when making specific divisions.