Greece's far-left Syriza party has formed a new coalition government on Monday with a center-right fringe party, but its stance against austerity, privatization, foreign investment, the United States and Germany may create waves of uncertainty in coming days.

Alexis Tsipras, the 40-year-old leader of Syriza, pledged to renegotiate Greece's massive international bailout and vowed to end what he called Greece's five years of "humiliation and pain". But European leaders in Germany, Belgium, the UK and France have warned him to stop making promises he can't fulfill.

Tsipras was sworn in as Greece's new prime minister on Monday. Observers in Athens have urged Tsipras to actively engage with China and visit the country as soon as possible to maintain the momentum of the relationship.