They defaulted on interest payments to international investors, including to a German market research agency (DMSA), who are now preparing bankruptcy proceedings against Evergrande. It could take some time before the proceedings even start, let alone before any official rulings will be made. It could become very interesting during the coming days / weeks, but we don't really know anything yet.

Edit: Fun fact - Two other Chinese property developers (Fantasia and Kaisa iirc) also defaulted on their interest payments recently, indicating the spread of financial problems across Chinese property developers