If this thing exists, but you find that it can be used to treat diseases, you can't apply for patent protection, because Article 25 of the Patent Law of China clearly stipulates that you can't apply for a patent for the diagnosis and treatment of diseases.
Please refer to the attached laws:
Article 25 No patent right shall be granted to the following projects:
(1) scientific discoveries;
(2) rules and methods of intellectual activities;
(3) Methods of diagnosis and treatment of diseases;