Credible. Wang meridian dredging instrument was invented by Mr. Wang after more than 20 years of painstaking research. The pore therapeutic instrument is equipped with constant temperature and heat, dynamic hyperoxia, biomagnetic energy, colorful nuwa stone and biochip (far infrared ray) to fully dredge the body. Wang's through-hole instrument has passed the test of the State Administration of Pharmaceutical Products and can be used with confidence.