China’s President Xi Jinping will travel to Moscow next week to hold talks with Russian President Vladimir Putin, officials say.
The Kremlin said they would discuss a “comprehensive partnership and strategic cooperation”.
The visit comes as Beijing, an ally of Russia, has offered proposals to end the war in Ukraine, to which the West has given a lukewarm reception.
Western countries have warned Beijing against supplying Moscow with weapons.
Beijing’s foreign ministry said Mr Xi will be in Russia from 20 to 22 March at the invitation of Mr Putin.
China’s foreign ministry spokeswoman Hua Chunying said China would uphold “an objective and fair position” on the war in Ukraine and “play a constructive role in promoting talks for peace”.
China’s peace proposals called for peace negotiations and respect for national sovereignty. But the 12-point document did not specifically say that Russia must withdraw its troops from Ukraine.
In February Ukrainian President Volodymyr Zelensky said he wanted to meet Mr Xi – “I really want to believe that China will not supply weapons to Russia,” he said.
Some US media have reported that Mr Xi and Mr Zelensky will speak by phone after the Chinese leader’s visit to Moscow, but this is yet to be confirmed.
Kyiv has been pushing hard for some kind of engagement. Ukraine believes President Xi is making the visit to send a signal to the world that Russia has at least some allies.
In an interview with the BBC before President Xi’s visit was announced, Mr Kuleba said: “I don’t think China has reached the moment now when it wants to, when it’s ready to arm Russia. Nor do I think that this visit will result in peace… The visit to Moscow in itself is a message but I don’t think it will have any immediate consequences.”
The message, Mr Kuleba said, was “that China and Russia are very close, close enough for the Chinese leader to visit his Russian counterpart, who is not doing very well.
“And I think this is the message to the entire world, to the West but also most importantly, to the non-West, that Russia is not alone, that China is talking to them.”
The US is keen for Mr Xi and Mr Zelensky to be in contact. US National Security Council spokesman said it would be “a very good thing if the two of them talk”.
Meanwhile, China’s foreign minister on Thursday urged Kyiv and Moscow to restart peace talks as soon as possible during a phone call with Mr Kuleba, who in turn said the two had discussed the “significance of the principle of territorial integrity”.