Hana ?ia ka mea kumu i nā pā kila kila mai Wuhan Iron and Steel Co., Ltd. a me Panzhihua Iron and Steel Co., Ltd. Ua ?oki pono ?ia a ku?i ?ia i kahi ?ano ki?eki?e ?O nā ka?ina hana e pili ana i ka ho?oma?ama?a ?ana i ka wela hau, ka ho?oma?ama?a ?ana i ka wela a me ka mālama anti-rust ?o 30% -40% no ka 2.0 a ma lalo ?O ka wehe ?ana ma luna o 2.0 he 40% -48%, a pa?a nā huahana nānā ?ia e hō?oia i ka maika?i.