Representatives of enterprises from northwestern China's Ningxia Hui Autonomous Region and Saudi Arabia sign contracts in Riyadh on Feb. 20. On the same day, Ningxia started trade promotions in the Middle Eastern country. A total of more than 100 delegates from Ningxia's government and enterprises made extensive exchanges with the local business representatives, totaling $4.614 billion USD contracts for eight projects. [Photo: Xinhua]