"Every generation has its own mission. Our efforts to conserve the ecosystem will benefit not only this generation, but many more to come," he said.

During the Second Belt and Road Forum for International Cooperation that ended on Saturday, participants agreed to pursue open and green development in Belt and Road cooperation, Xi said.

He pointed out that countries should advocate the value of green development that reveres and cares for nature "so that blue skies, green fields and clear waters will be a vision cherished by all".

A sound environment promises great economic potential, generates good returns, and contributes to economic and social stability, Xi said.

"I have always said that green mountains and clear waters are indeed mountains of gold and silver, and that environmental improvement means great productivity," he added.