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The "Seminar of Young Officers" has been held many times during previous forums. Themed "One Planet, One World, Building a Community with Shared Future for Mankind," the seminar gathered young officers and scholars from around the world to discuss international and regional security issues.

China has done more than others to combat poverty, taken steps to combat climate change, and contributed a lot to peacekeeping and humanitarian aid, said the UN official, adding China is in a leading role to promote international understanding and cooperation.

It was not the first time for the Chinese president to sound the alarm on the crucial situation mankind was in.

He said that it is of special significance to be here to recall the original intention of the establishment of the United Nations, as well as the original ideals and aspirations related to that institution, and to adhere to peace.

Xi said he hoped the new cooperation in aviation, aerospace and other fields could be well implemented.