&#216；Delong；Roll；is；located；in；the；city；of；Xingtai,；Hebei；province,；China,；invested；by；Delong；Holdings；Ltd,；which；is；listed；company；in；Singapore. &#216；Delong；Roll；was；established；in；July；of；2007；with；a；total；assets；of；600；million；CNY.；By；now；it；is；the；deputy；president；of；China；Rol...More