加州高鐵正為地下化傷腦筋，日韓德法西意都想搶合同，中國二手技術？

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.