(Bloomberg) -- A large but secretive group of creditors is emerging as one of the last major roadblocks to a historic restructuring of China Evergrande Group.Most Read from BloombergDebris Spotted in Search for Missing US F-35 Fighter JetVegas’ Newest Resort Is a $3.7 Billion Palace, 23 Years in the MakingHow Auto Executives Misread the UAW Ahead of Historic StrikeTrillion-Dollar Industry Powering Chicago at Risk of LeavingXi’s Missing Defense Chief Opens Door for US Military TalksIdentified onl