The United States Federal Reserve Board's announcement that it will scale back its bond-buying program could crimp liquidity in China at a delicate moment, analysts warned.

China's interbank lending rate is at its highest since June, when the central bank pushed up rates to discourage borrowing, a move engineered partially to prevent further shadow banking activity, said Patrick Chovanec, managing director of Silvercrest Asset Management Group and former economics professor at Tsinghua University.

"Part of the liquidity that's been provided has been US dollar borrowing, both licit and illicit," Chovanec told China Daily on Wednesday after the Fed's announcement.