Five core business segments 1. Rubber carbon black: There are 13 kinds of carbon black for rubber such as N115, N134, N219, N220, N234, N326, N330, N339, N375, N351, N550, N660, N774, etc., which are widely used in radial tires and oblique Industrial fields such as tires, inner tubes, bicycle tires, conveyor belts, hoses, shoes, railway equipment and road and bridge engineering rubber; Second, special carbon black: mainly pigment carbon black, masterbatch carbon black, ink carbon black, cable