Tianyuan Technology’s Nanjing Magnetic Material Plant passed the verification of CQCISO9002 Quality Control System in 2000. It majors in both hard and soft magnetic materials, with the following main products: mangano-manganic oxide, large specific surface area mangano-manganic oxide (BET=15~20 m2/g) and low selenium superpure mangano-magnetic oxide (Se≤1ppm); Y30-1 and Y30H-2 pre-sintered strontium ferrite and pre-sintered high performance permanent magnetic strontium ferrite that are equivalent to FB5B、FB5H and FB6B in TDK standards. The pre-sintered permanent magnetic ferrite wet produced by this plant is of domestic leading level in performances.