Most of the underwater property developers are wealthy patrons of the ruling red party in China and will ultimately receive similar government bailouts. Privatized gains and socialized losses it's the same movie everywhere.
But this is just theatre, on the order of 1 trillion disappearing in smoke is not going to sink the ship of any nation with 100 trillion in wealth assets.
edit: I should say this money doesn't really disappear in smoke, it's bourne on the backs of mostly middle classes amortization over the period of decades in hidden inflation taxes and marginal lower living standards.