Changzhou City Yunhe Welding Material Co.,Ltd. Established in 1987, Located in economically developed center Yangtze River Delta, near Shanghai, the largest sea port city of China. We are a professional manufacturer of welding wire. We have more than 450 employees and cover an area of over 35,000 square meters. Da YUNHE brand products include gas-shielded welding wire, submerged arc welding wire, stainless steel welding wire, aluminum