China's overall economic outlook was positive, Wen said Wednesday at the opening of the African Development Bank's annual meeting in Shanghai. He also promised that Beijing would make interest rates more flexible while using all available options to control growth of its money supply and ensure economic stability.

That could indicate tightening measures may be on the way to cool an economy that grew a blistering 11.1 percent in the first quarter growth that authorities worry could lead to a debt crisis or higher inflation.

"There are some problems. We face excessive liquidity, an imbalance in the balance of payments, and rapid accumulation of foreign exchange. But we are taking measures to deal with these issues," Wen said.

"We are fully confident and capable of resolving the problems and maintaining sustained, stable and sound growth of the financial sector," he said.

China's bulging global trade surplus which last year grew to US$177.5 billion and currency regime are expected to among the top issues discussed at a meeting of top Chinese and U.S. trade officials next week in Washington.