Tianjin Zhengjian Nano-Tech Co., Ltd. is a High-Tech Group company engaged in Nano Technology Development and Nano & Tourmaline Product Production, Processing and Global Promoting. With the introduction of advanced Technology and excellent Tourmaline Materials from Korea and through the cooperation with our Domestic top University and Institution, we have developed series of Tourmaline Heal-Care products and Health-Care Sauna Cabins based on the technology of Nano, Infrared Radiation, Aerodynamics, Human biology, Physics and Magneto therapy.