Cooperation involving energy, including nuclear power, has become "high on the agenda" for the China-Russia partnership, said Tan Jijun, an expert with Beijing-based China Foreign Affairs University.

China and Russia, the world's third- and ninth-largest economies, signed a package of deals earlier this year, highlighted by a pipeline construction project, a long-term crude oil trading deal and a financing plan. In June, a memorandum on delivery of Russian natural gas to China was also signed.

The Sino-Russian crude oil pipeline is expected to wrap up next year and will start the supply in 2011, according to Xinhua.

Chinese media also reported a contract to build a joint venture refinery in the northern city of Tianjin is to be signed.

During Putin's visit, Russia's diversified holding company JSFC Sistema will sign a $200 million deal with the Bank of China and telecom equipment maker ZTE Corp, while China National Materials (Sinoma) and investment holding company CNBM will sign four cement production facilities construction deals with Russian cement maker Eurocement.

"Facing the financial crisis, Russia is particularly eager to develop its trade and business with China in a wide range of areas, including not only the energy cooperation but also in the high-tech sector," Tan said.

He said a deal on building a high-speed railway in Russia, which is expected to be signed during Putin's visit, was an example of the two nations' cooperation beyond energy.

Li Fenglin, director of Euro-Asia Social Development Research Center under the State Council Development Research Center, said China and Russia have great potential in expanding economic cooperation from energy to many other areas such as technology and investment. Li is the former Chinese ambassador to Russia.

Putin's visit marks the 60th anniversary of diplomatic relations between the two nations.

He will leave tomorrow after attending the 14th regular meeting of prime ministers of Russia and China today, and a summit of prime ministers from the Shanghai Cooperation Organization tomorrow.