BEIJING (Reuters) -China said on Wednesday that it is "unreasonable and unrealistic" to ask the country to join nuclear disarmament negotiations with the United States and Russia.

Guo Jiakun, a spokesperson for the Chinese foreign ministry, made the remarks after U.S. President Donald Trump said he had discussed nuclear arms control with Russian President Vladimir Putin and wanted China to be involved too.

"The nuclear forces of China and the United States are not at the same level at all, and the strategic security environment and nuclear policies of the two countries are totally different," Guo said.

China pursues a policy of no first use of nuclear weapons and a nuclear strategy of self-defence, he said, adding Beijing will not engage in an arms race with any other country.

"Countri

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