WETI technology is a new surface treatment process developed by our company based on years of experimental research and actual production experience. It involves two or more combinations of substances with different physical properties and chemical properties, and a variety of advantages are obtained. The multi-phase solid composite material is processed by a special method to produce a suitable roughness on the metal surface, and then combined with the resin by injection molding to ensure a good bonding force between the metal and the resin.