Guangxi Nanning Long Feed Co., Ltd., a former manufacturer specialized in simplex feed-grade microelement additives and animal feed, now has been transforming into a comprehensive enterprise which owns different quality product lines ranging from feed-grade microelements, microelement premix feed to compound premix feed. These products include: copper sulfate, ferrous sulfate, zinc sulfate, manganese sulfate, cobalt sulfate, magnesium sulfate, calcium iodate, sodium nitrite, organic chromium in feed-grade microelement category; microelement premix feed additives for piglet, middle or grow-up pigs, sows, meat birds, egg birds, fishery and prawns; series of compound premix feed for poultry and livestock; concentrated feed additives and feed flavoring. Junwei therefore now has become a modern professional enterprise integrating manufacturing, trading as well as technical research, creating and applying in the field of feed microelement.