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"This is a pioneering work in China-U.S. high-tech cooperation, which is on a voluntary basis. This shows the open attitudes of both sides," Li said. He expected win-win results in this cooperation.

"As a beneficiary of and contributor to economic globalization, China's development is the opportunity for the world. China's opening up is not a zero-sum game but win-win cooperation," Xi said.

Combustible ice can be ignited like solid ethanol. One cubic meter is equal to 164 cubic meters of regular natural gas.

Xi, also general secretary of the Communist Party of China (CPC) Central Committee, made the remarks in an instruction on cultural and ideological progress.

The new route was launched under cooperation between China and Kazakhstan to further reduce logistics costs.