Participants of the international conference "Belt and Road Initiative: Six Years After" pose for a photo in Belgrade, Serbia, on April 15, 2019. China's global cooperation project has emerged as a major factor in the infrastructural and economic development of Serbia and the Western Balkans, fostering regional partnership and mutual benefits, said keynote speakers of an international scientific conference dedicated to the sixth anniversary of the Belt and Road Initiative (BRI) here on Monday. (Xinhua/Nemanja Cabric)