As we all know, China ceased their invasion after they occupied most of the key cities and despite declaring that Hanoi was open for Chinese occupation, they simply withdrew by March 6th. And of course still had constant border conflicts since then, despite none of them drawing them into another conflict on the scale of the Sino-Vietnamese War and that Vietnam still was occupying Cambodia, China's ally, at the time. But what if China decides to still insist on fighting Vietnam by going straight to Hanoi? Will the Soviet Union take notice and threaten to intervene on Hanoi's behalf? Would this effect China's need to economically reform at the time?