hong kong dec 9 reuters  bank of china one of chinas top four stateowned banks has offered offshore loans to cashstarved chinese property developer longfor group holdings ltd 0960hk it said in a statement on friday the move was part of the arrangement by regulators to help developers repay their debts as china has stepped up support in recent weeks to undo a liquidity squeeze that has stifled the sector which makes up a quarter of the worlds secondlargest economy and has been a key driver of growth