China's economy cannot develop without the context of the broader global environment, and the recovery of many Chinese companies is mainly backed by the government's supportive policies, Chinese Premier Wen Jiabao said on Sunday at a press conference in Beijing after the conclusion of the national legislature's annual session.

The economy is complicated by a lot of uncertain factors, although the world is generally recovering,?the main problems of the global economy still exist, Wen said.

"The unemployment rate of the world's main economy is still high, some countries' debt crises are still deepening, and the world's commodity prices and exchange rates are not stable, which are most likely to become the cause of any setback in the economic recovery," he said.

"The shock of the global economic crisis on the Chinese economy in some degree?imposed on?our development model, which cannot be changed in a short time and needs our constant efforts," he said.

"We must put transforming our economic development model and adjusting our economic structure in a very important place to change the unbalanced development of China's economy," Wen said.