Robots are seen at the fifth China-Arab States Expo in Yinchuan, northwest China's Ningxia Hui Autonomous Region, Aug. 20, 2021. The fifth China-Arab States Expo opened Thursday in Yinchuan. A total of 277 deals worth approximately 156.7 billion yuan (about 24 billion U.S. dollars) have been signed at the ongoing fifth China-Arab States Expo in northwest China's Ningxia Hui Autonomous Region. (Photo: Xinhua)

Photo taken on Aug. 20, 2021 shows the cross-border e-commerce and digital economy exhibition area of the fifth China-Arab States Expo in Yinchuan, northwest China's Ningxia Hui Autonomous Region. The fifth China-Arab States Expo opened Thursday in Yinchuan. A total of 277 deals worth approximately 156.7 billion yuan (about 24 billion U.S. dollars) have been signed at the ongoing fifth China-Arab States Expo in northwest China's Ningxia Hui Autonomous Region. (Photo: Xinhua)

Photo taken on Aug. 20, 2021 shows the clean energy and new materials exhibition area of the fifth China-Arab States Expo in Yinchuan, northwest China's Ningxia Hui Autonomous Region. The fifth China-Arab States Expo opened Thursday in Yinchuan. A total of 277 deals worth approximately 156.7 billion yuan (about 24 billion U.S. dollars) have been signed at the ongoing fifth China-Arab States Expo in northwest China's Ningxia Hui Autonomous Region. (Photo: Xinhua)

Exhibitors are seen at the fifth China-Arab States Expo in Yinchuan, northwest China's Ningxia Hui Autonomous Region, Aug. 20, 2021. The fifth China-Arab States Expo opened Thursday in Yinchuan. A total of 277 deals worth approximately 156.7 billion yuan (about 24 billion U.S. dollars) have been signed at the ongoing fifth China-Arab States Expo in northwest China's Ningxia Hui Autonomous Region. (Photo: Xinhua)

Exhibitors are seen at the fifth China-Arab States Expo in Yinchuan, northwest China's Ningxia Hui Autonomous Region, Aug. 20, 2021. The fifth China-Arab States Expo opened Thursday in Yinchuan. A total of 277 deals worth approximately 156.7 billion yuan (about 24 billion U.S. dollars) have been signed at the ongoing fifth China-Arab States Expo in northwest China's Ningxia Hui Autonomous Region. (Photo: Xinhua)

An exhibitor (R) introduces exhibits at the fifth China-Arab States Expo in Yinchuan, northwest China's Ningxia Hui Autonomous Region, Aug. 20, 2021. The fifth China-Arab States Expo opened Thursday in Yinchuan. A total of 277 deals worth approximately 156.7 billion yuan (about 24 billion U.S. dollars) have been signed at the ongoing fifth China-Arab States Expo in northwest China's Ningxia Hui Autonomous Region. (Photo: Xinhua)

A staff member of China Telecom introduces an intelligent helmet at the fifth China-Arab States Expo in Yinchuan, northwest China's Ningxia Hui Autonomous Region, Aug. 20, 2021. The fifth China-Arab States Expo opened Thursday in Yinchuan. A total of 277 deals worth approximately 156.7 billion yuan (about 24 billion U.S. dollars) have been signed at the ongoing fifth China-Arab States Expo in northwest China's Ningxia Hui Autonomous Region. (Photo: Xinhua)

Exhibitors are seen at the fifth China-Arab States Expo in Yinchuan, northwest China's Ningxia Hui Autonomous Region, Aug. 20, 2021. The fifth China-Arab States Expo opened Thursday in Yinchuan. A total of 277 deals worth approximately 156.7 billion yuan (about 24 billion U.S. dollars) have been signed at the ongoing fifth China-Arab States Expo in northwest China's Ningxia Hui Autonomous Region. (Photo: Xinhua)