Tianjin Zhengjian Nano-Tech Co., Ltd. is a high-tech group company engaged in scientific research, development, production and sales. With the introduction of excellent tourmaline materials and combined with dispersed nano-materials technology, biotechnology and surface finishing technology,we have developed series of high value-added products with super-strong composite effect. Our company attaches great importance to the building of enterprise culture, We have been adhering to the busine...View More