for civil disputes, i am sure they are.
For disputes between the gov't and you, i highly doubt it. Is there a single instance of the gov't being sued for a policy that was meant to be political in nature affecting the supplicant?
Even someone like jack ma is unable to use the courts to obtain any justice - his Ant Financials IPO was shut down for political reasons, and he was reeducated. There's no such thing as due process in china.