The two officials will "have an in-depth exchange of views on practical cooperation," state broadcaster CCTV said.

They will also discuss "their respective domestic climate policy actions and the multilateral process on climate change," CCTV said.

Envoys Liu and Podesta met for the first time in their roles in Washington in May, promising to work together on the reduction of methane, the second-most abundant greenhouse gas.

In the two days of talks, the pair looked for ways of "promoting a successful COP29 in Baku, Azerbaijan," the next climate summit, which takes place in November, the US State Department said.

Their predecessors' unusually close relationship helped bring consensus at last year's COP28 summit in Dubai.