加州高铁正为地下化伤脑筋，日韩德法西意都想抢合同，中国二手技术？

State-owned Chinese equipment manufacturers initially licensed many of their designs over the last decade from Japan, Germany and France. While Chinese companies have gone on to make many changes and innovations, Japanese executives in particular have grumbled that Chinese technology resembles theirs, raising the possibility of legal challenges if any patents have been violated.