Rumor has it here China Defense Blog: Jianghu class rumor.
The pictures are photographed today (on 3rd March 2012), so pretty latest info.
Could these be for Bangladesh navy? even if not, then there will be very similar ships in the same class. And plus there are those newly (in building?) F-22B frigates we've all heard for quite a while.
Below: Jianghu II / 053H1 ships: