His Highness the Amir Sheikh Tamim bin Hamad al-Thani participated Friday in the Riyadh Gulf-China Summit for Co-operation and Development, held at the King Abdul Aziz International Conference Centre. Several leaders of fraternal Gulf states participated in the summit, in addition to Chinese President Xi Jinping. The summit was attended by the Amir's accompanying delegation, Their Excellencies delegate members, senior officials, and guests of the summit.