KORYO, is Sino-Japan Joint-ventures one of the Chinese leading manufacturers, the home on "KORYO" "DOUBLE RICH" "BIGSTONE" brand. We are producing six categories and nearly one thousand kinds and sizes of bias tyre, OTR tyre, radial tyre, Industrial tyre, agricultural tyre and solid tyre. We have obtained ISO 9001,American standard DOT certification, European Community standard ECE and Gulf standard GCC Certification.