Alibaba.com: Manufacturers, Suppliers, Exporters & Importers from the world's largest online B2B marketplace Manufacturers, Suppliers, Exporters, Importers, Products, Trade Leads, Supplier, Manufacturer, Exporter, Importer As a member of China Fasteners Association, Ningbo Zhengyu Fasteners Co., Ltd, is a joint venture enterprise, specializing in producing large-sized fasteners, especially the concrete lifting products. Founded in 1999, our company is equipped with over one hundred sets of appropriative devices, including 10-odd sets of inspecting apparatus.