Sound waves similar to human life information emitted by Tongde Health Sound Holographic Tongluo Instrument can effectively resonate with human meridians and viscera, thus causing the effect of dredging meridians. The generated sound wave is 20-20000HZ, which belongs to the national inspection-free safety range and belongs to daily health care equipment, not medical equipment. So you don't need the scope of food and drug supervision, you can go to the State Quality Supervision Bureau and the State Patent Office to check the relevant qualifications.