Russian President Vladimir Putin has landed in Beijing for this week's Belt and Road Forum, state broadcaster CCTV reported.
African and Southeast Asian leaders will also be among representatives from more than 130 countries and 30 international organisations expected to gather for the two-day event beginning on Tuesday, the foreign ministry said in a statement.
In a meeting with his Chinese counterpart Wang Yi on Monday morning, Russia's Foreign Minister Sergey Lavrov said: "We are interested to seeing the 3rd international Belt and Road Forum be successful and we are confident that will be the case."
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Lavrov said he was "very happy" to be discussing the international agenda and other issues "that are necessary to prepare meetings between our leaders".
The third edition of the forum, put on hold since 2019 due to the Covid-19 pandemic, marks the 10th anniversary of China's global infrastructure-building scheme, the Belt and Road Initiative.
More than 150 countries and 30 international organisations are currently on board, according to the foreign ministry.
Putin attended the two previous forums in 2017 and 2019. Russian news agency Tass reported that Beijing extended an invitation to Putin in July, and he confirmed he would visit when he met Wang in St Petersburg last month.
"We believe in merging our vision of creating a Greater Eurasian space with the idea of our Chinese friends as part of the Belt and Road Initiative, and we have been quite good at synchronising our efforts," Putin said at the time, adding that the strategy "fully meets and coincides" with Russia's interests.
At an international forum in Sochi earlier this month, Putin pledged to increase security and economic cooperation with Beijing in the face of a confrontational and "bloc-based" Western order.
"Cooperation between Russia and the People's Republic of China is, of course, a very important factor stabilising the world," he said. "It is aimed exclusively at achieving a positive result both for us - Russia and China - and for our partners around the world."
Chinese President Xi Jinping last met Putin when he travelled to Moscow for a three-day state visit in March. The two leaders then held a series of talks on matters including the war in Ukraine.