My tuppence worth: Highly likely to default (nothing shocking in that statement), unlikely government will step in directly - after all these are the policies it adopted playing out. Likely China government will engineer a managed restructuring, estimates are around 45-55% recovery on debt but bonds currently trading lower to reflect blended risk of not honouring the USD denominated bonds. Impacts on domestic property market, expectation China will loosen current property policies to prevent contagion - this approach seems likely given the closed financial system and interventionist regulators.
Non-CNY bonds are, I think, about $20bn or so of total debt pile so not too troubling.