We are professional in naphthalene series water-reducer, short for FDN or PNS, owning FDN-A, FDN-B, FDN-C three kinds of super plasticizers. Can produce according to requirement. After years of development, more than 1000 employees work here, and annual sales volume is over 2 billion RMB.. The annual output is totally over 300,000 metric tons in powder, takeing the first place in China.