▁service ▁between ▁Dallas / F ort ▁W orth ▁and ▁Be ij ing , ▁but ▁changed ▁the ▁application ▁to ▁include ▁an ▁east bound ▁stop ▁in ▁Chicago ▁after ▁an ▁imp asse ▁with ▁pil ots ▁regarding ▁work ▁hours ▁on ▁the ▁planned ▁flight . ▁▁ 2 0 0 7 ▁agreement ▁covering ▁expansion ▁from ▁ 2 0 0 7 ▁to ▁ 2 0 0 9 ▁ ▁In ▁April ▁ 2 0 0 6 , ▁the ▁two ▁countries ▁began ▁negoti ations ▁for ▁further ▁liberal ization ▁of ▁the ▁bil ater al ▁agreement . ▁Tal ks ▁were ▁susp ended ▁in ▁August ▁ 2 0 0 6 , ▁but ▁later ▁res umed . ▁The ▁United ▁States ▁has ▁stated ▁that ▁susp ension ▁of ▁tal ks ▁was ▁due ▁to ▁an ▁un related ▁issue . ▁Un o fficial ▁Chinese ▁sources ▁report ▁that ▁there ▁was ▁concern ▁because ▁of ▁a ▁" g ap " ▁in ▁Chinese ▁air lines ' ▁ability ▁to ▁comp ete ▁with ▁U . S . ▁air lines . ▁Neg oti ations ▁were ▁scheduled ▁to ▁res ume ▁in ▁January ▁ 2 0 0 7 . ▁ ▁An ▁agreement ▁reached ▁on ▁July ▁ 7 , ▁ 2 0 0 7 , ▁allows ▁nearly ▁un limited ▁service ▁between ▁China ▁and ▁Gu am ▁and ▁between ▁China ▁and ▁the ▁Northern ▁Mar iana ▁Islands . ▁These ▁un limited ▁rights ▁do ▁not ▁include ▁Be ij ing ▁or ▁Shang hai ▁fl ights ▁operated ▁by ▁US ▁air lines ▁but ▁do ▁include ▁those ▁cities ▁for ▁main land ▁Chinese ▁air lines . ▁ ▁Not ▁including ▁the ▁potential ▁expansion ▁to ▁Gu am ▁and ▁Sa ip an