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The gathering came one day after the premier met with U.S. President Barack Obama in New York, during which Li called for concerted efforts to promote economic and trade ties between the world's top two economies.

Xi put forward four proposals in developing Beijing-Manila ties: to cement political trust, expand substantial cooperation, promote people-to-people exchanges and strengthen cooperation in regional and multilateral affairs.

The length of time that the two astronauts must spend in the space lab -- 30 days -- will pose the biggest challenge. Once inside Tiangong-2, they must carry out experiments related to in-orbit equipment repairs, aerospace medicine, space physics and biology.

When addressing a welcoming dinner party organized by the Economic Club of New York on Tuesday, the premier said frictions represent only a minor part in China-U.S. economic relations, calling upon the two sides to expand common interest and properly handle differences.

The 11th China International Aviation and Aerospace Exhibition is scheduled to start in the southern port city on Tuesday.