The Chinese and Russian leaders meet again on Tuesday during Xi Jinping's visit to Moscow.
China's plan did not specifically say that Russia must withdraw from Ukraine - which Ukraine has insisted as a precondition for any talks.
On Monday, a military band gave Mr Xi a warm welcome to Moscow. Mr Putin hailed China for "observing the principles of justice" and pushing for "undivided security for every country". Before Mr Xi's arrival, Mr Putin wrote in China's People's Daily newspaper that the two nations would not be weakened by "aggressive" US policy.
The fear in Kyiv is that China's support for Russia - currently based around technology and trade - might become military, potentially including artillery shells.
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