For a start, things before 1950 still happened. Even during the decades you admit happened, those areas refused to acknowledge the existence of China, making trade impossible.
Early Maoist policy hadn't helped matters, but it's pretty hard to argue American, Japanese, and European policy hadn't already left them in an incredibly shitty position.
Early Maoist policy hadn't helped matters, but it's pretty hard to argue American, Japanese, and European policy hadn't already left them in an incredibly shitty position.