Shanghai Sheeny Metal Materials Co., Ltd., founded in 2015, is a high-purity new materials enterprise integrating R&D, production, customized sales, and technical services. With decades of rare-earth purification expertise, the company operates production bases in Longnan (Jiangxi) for rare-earth purification and Guangzhou/Foshan (Guangdong) for high-purity oxide refining. Key technologies include multi-stage solvent extraction with chemical precipitation for 4N–5N oxide production, multi-element co-precipitation for YAG precursor powders, and small-batch customization of high-purity compounds, alloys, and sputtering targets. Main products: rare earth oxides, high-purity inorganic oxides, rare earth metals, and rare earth alloys. Flagship products — CaO (99.995%–99.999%), MgO (99.995%–99.999%), and nano Al?O? (≥99.999%) — Serve piezoelectric crystals, scintillation crystals, transparent ceramics, laser crystals, functional ceramics, luminescent materials, semiconductors, and biomedical fields .