History; exactly. It is all history now.
The Chinese have now refused to extend major help with the nuclear/missile program. The tot of M-11s was the last thing they did open-heartedly. We did have help with the rest of the missile program, but not on the scale you imply.
Thats why we need that trade corridor up and running ASAP which would not only bring economic prosperity but give them a reason to do more cooperation "open hearted" due to the strategic importance of such a route.