Donghai Koken Technology Co., Ltd.   

        East China Sea Qingdao HENGJIAN Nano Technology Co., Ltd. is a collection of scientific research, development, production and sales as one of the modern high-tech enterprises, long-term cooperation with many universities domestic well-known research institutions and experts, professors and other scientific research personnel, and constantly develop new products, and always maintain the technological content of products is in the leading position in the industry, the existing products adopt international high-tech nano material, the main business and human health are closely related to Korean Khan steam room, mobile Khan steam room, tourmaline mattress, the tourmaline health preserving cup, nano energy cup tourmaline health underwear, men and women, magneto necklace, natural purple clay nano energy cup, tourmaline purple sand cup, stone pot medical, medical stone water dispenser, medical stone cup, self heating protector series of health products.