Longnan Longyi Heavy Rare-Earth Technology Co., Ltd. (stock code 831879), whose top two shareholders are Jiangxi Longyi Holding Co., Ltd. and Ganzhou Industrial Investment Holding Group Co., Ltd. (state-owned), is a national high-tech enterprise, a national specialized and new enterprise, a national intellectual property advantage enterprise and a national green factory. Over the past 30 years, it has fully utilized the advantages of heavy rare earth resources, taking yttrium as the source, creating the world, and focusing on the application of yttrium from beginning to end. It has built a unique advantage in the entire industrial chain from rare earth separation, heavy rare earth alloy preparation, heavy rare earth additive cored wire, intelligent supply equipment for wire, high-strength heat-resistant rare earth light alloy and rare earth heat-resistant and corrosion-resistant alloy.