BOAO, Hainan, April 10 (Xinhua) -- China will not threaten anyone else, attempt to overturn the existing international system, or seek spheres of influence, no matter how much progress it has made in development, President Xi Jinping said Tuesday.

The country will "stay as determined as ever to build world peace, contribute to global prosperity and uphold the international order," he said in a keynote speech delivered at the opening ceremony of Boao Forum for Asia annual conference.