SANTIAGO (REUTERS) - China hopes to welcome the United States "back to the negotiating table" to discuss global efforts to limit climate change at a United Nations summit to be hosted by Chile in December, its top climate change envoy said on Tuesday (Aug 20).

Mr Xie Zhenhua, China's Special Representative for Climate Change Affairs, told journalists during a visit to a solar energy plant outside the Chilean capital Santiago that China would provide "full support to the Chilean presidency of this meeting."

The summit was "strong proof that a multilateral negotiation process is successful, that multilateralism is working," he said.

Asked if the US approach to the threat of climate change under President Donald Trump and the US-China trade dispute might affect the outcome in Santiago, Mr Xie replied: "China and the US has many differences but we do have some common grounds on climate change issues as well and we welcome them back to the negotiating table on climate change, we are very open to that."

Mr Trump has signalled his intention to withdraw the United States from the 2015 Paris climate accord and been dismissive of regulations aimed at slashing greenhouse gas emissions. He has also expressed his preference for bilateral trade pacts over multilateral agreements.

In July, China pledged on the sidelines of the G-20 summit in Osaka to show "the highest possible ambition" in the fight against climate change.

Experts and policy advisors say the world's biggest greenhouse gas emitter could introduce new and more stringent carbon targets next year.

Mr Xie said China would back a bid by the UN secretary-general and climate change envoy to persuade all countries to update their Nationally Determined Contributions (NDC) goals to keep global warming to well below 2 deg C.

"The most important objective is to identify the new NDCs for the post-2020 period and link those new NDCs together with the financial support from the developed countries as promised,"Mr Xie said. "To have that financial support in place is very important and that's the objective we would like to achieve."

China is a key investor in Chilean renewable energy projects and manufactured half of the solar panels at the 110MW Parque Quilapilún solar plant Mr Xie visited with environment minister Carolina Schmidt.

Ms Schmidt will serve as president of the COP25 UN climate change summit in December.