President Vladimir Putin of Russia is in Beijing where the Syrian conflict is expected to be on the agenda in talks with China.
On Tuesday, China and Russia reinforced their opposition to foreign intervention in Syria and urged support for UN envoy Kofi Annan's peace plan.
Both countries have twice blocked UN resolutions critical of Damascus and resisted pressure to remove President Bashar al-Assad from power amid ongoing unrest.
The BBC reports Mr Putin has had talks with President Hu Jintao.
It's considered that Moscow holds the key to ending the violence in Syria by putting pressure on its ally, the Bashar al Assad regime.