O'green co., ltd is established in july, 2006 and located in guangrao, dongying, shandong. now the production capacity has goes up, the annual capacity of all-steel radial tires is two million sets, tubeless steel wheels two million pieces, tube steel wheels one million pieces and tubes one million sets. now the company has obtained certificates of iso/ts16949:2009, iso9001:2008 and passed the national ccc authentication, american dot, european ece and germany tuv.