Which most observers assumed would sort itself out in short order--and it did.
There was a palpable sense of pending disintegration. Then, enter the one two punch of Bruning and Hitler. What makes you think that if, indeed, chaos took hold in the PRC, something similar would not happen?
Simple: Germany was pretty much one nation.
Modern China, like ancient Gaul, is divided into three parts--much as the US in 1860 was in two very distinct parts.
Where is your historicaly basis and logic man!
Where's yours?
Nobody seriously anticipated that disunion and large-scale war would follow the US elections of 1860. But they did.
Not so simple. Economically it's feasible to divide China into at least five "macro-regions" - their origins go back centuries. Nowadays the geographic division isn't very clear-cut. For instance, there are fairly well-developed cities all along the Yangtze river, just as there are huge swathes of third-world countryside even near the east coast. Generally speaking there aren't very neat faultlines for China to split along in case of social unrest. Historically China would fragment for extended periods largely due to inadequate infrastructure - i.e. it took months for officials from Beijing to reach Canton as late as the Manchu dynasty - and in the 20th century, due to Japanese aggression. Obviously these conditions can no longer arise in the 21st century.