I Enactment of the administrative methods In the end of 2001, China became a member of the World Trade Organization and cancelled some limits on vehicle import. As tariffs of auto parts became lower than that of complete vehicles, partial joint ventures began assembling complete vehicles KD parts and a lot of KD parts came in then. I Enactment of the administrative methods In the end of 2001, China became a member of the World Trade Organization and canceled some limits on vehicle import. As tariffs of auto parts became lower than that of complete vehicles, partial joint ventures began assembling complete vehicles KD parts and a lot of KD parts came in then.