ST. PETERSBURG, Russia, June 7 (Xinhua) -- Chinese President Xi Jinping here on Friday called for joint efforts in creating an open world economy, people-oriented and inclusive societies, and a beautiful homeland with harmonious coexistence between human and nature, so as to hold the "golden key" of sustainable development to solve global problems.

Xi made the remarks while addressing the plenary session of the 23rd St. Petersburg International Economic Forum (SPIEF) held in Russia.