Gongniu (Formely Bull) has built an industry-leading R&D and design team to meet our customers’ needs, of which we have done thorough investigations. Fully aware that raw materials affect the product quality, we have selected premium materials for each product.
Gongniu (Formely Bull) has established an international standard laboratory that is officially certified by the US-based professional certification organization UL. China’s and IEC standards for plugs, sockets and cables, and up to the standard testing requirements of World.
Gongniu (Formely Bull) is an international electrical devices provider dedicated to technological innovations. Gongniu (Formely Bull) management system and innovative products in adapters and domestic power connection devices have provided to the customers with a safe and comfortable environment for using electricity, thus improving life quality.