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Two guests talk with each other during the 2019 China-Arab States Tour Operators Conference, a sideline event of the fourth China-Arab States Expo, in Yinchuan, northwest China's Ningxia Hui Autonomous Region, Sept. 4, 2019. Held in Yinchuan from Sept. 5 to 8, the fourth China-Arab States Expo attracts around 12,600 participants from 2,900 regional organizations, commerce chambers, associations and enterprises in 89 countries. (Xinhua/Li Mangmang)