BEIJING, Dec. 18 (Xinhua) -- President Xi Jinping Tuesday underlined China's commitment to opening up wider to the world and promoting joint efforts to build a community with a shared future for humanity.

The practice of reform and opening-up over the past 40 years has shown that openness brings progress, while seclusion leads to backwardness, Xi said at a gathering to commemorate the 40th anniversary of the country's reform and opening-up.