China has a chance to assert leadership of a global plan to combat global warming this week at the first U.N. climate talks since U.S. President Donald Trump decided to quit the 195-nation Paris Agreement, delegates say.

Government experts are to work on a "rule book" for the 2015 climate pact at the Nov. 6-17 annual meeting in Bonn. The accord seeks to end the fossil fuel era this century with a shift to wind, solar and other clean energies.

Trump once dismissed climate change as a Chinese hoax to harm the U.S. economy and said in June that he will pull out of the agreement and instead promote U.S. coal and oil. A formal U.S. withdrawal will take until 2020.