Russia, the world's second-biggest oil exporter after Saudi Arabia, plans to ship 15 million tons of crude an increase of 25 per cent to China by rail this year.

Russia is also studying the possibility of exporting natural gas to China, he said, adding that energy co-operation was of "key significance."

The two countries aim to raise bilateral trade to US$60-80 billion by 2010. Last year, trade volume reached nearly US$30 billion, up 37 per cent from the previous year, according to Razov.

"Compared with China's trade figures with some other countries, it may not be a very big figure, but what matters most is the momentum of rapid growth," he said.

Analysts say Russia's export structure is imbalanced, which is demonstrated by the year-on-year decline of electric and mechanical products in the proportion of exports to China, which is a hurdle to even more robust growth.

"This has caused serious concerns for the Russian side," Razov said. "The proportion of value-added products shipped to China should be increased."

To promote the development of their strategic partnership, the two countries will celebrate the Year of Russia in China this year. Putin and Hu will jointly inaugurate the event in Beijing next week.

Sino-Russian relations have reached an unprecedented high with both sides having resolved border issues and supporting each other in major international and regional issues such as the Six-Party Talks on the denuclearization of the Korean Peninsula and the Iran nuclear crisis, Assistant Foreign Minister Li said at the news conference.

Beijing and Moscow are pushing for a more cautious approach to Teheran's nuclear programmes through diplomatic negotiations.

They are also participants in the Six-Party Talks, along with the United States, Japan and the Republic of Korea.

Negotiations have stalled since November, mainly due to the Democratic People's Republic of Korea's (DPRK) anger over sanctions imposed by the US for its alleged currency counterfeiting and money laundering.

"We hope both countries (the US and the DPRK) will bear in mind the larger interest and seek an early settlement of the dispute so that talks can be resumed at an early date," Li said.

A series of documents on bilateral relations and a joint statement will be signed during President Putin's visit, Li said.