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An employee checks crude oil processing equipment at the Shengli Oil Field in Dongying, Shandong province. [Photo by Hu Qingming/For China Daily]
An expert panel including scholars from Peking University, Hubei Provincial Museum and other institutions studied the artifacts following their return, concluding they "filled a void in historical studies".
An exhibitor walks a robot out of the exhibition venue after the 2020 China International Fair for Trade in Services closed on Wednesday in Beijing. [Photo/WU YIBIN FOR CHINA DAILY]
An image acquired by NASA's InSight Mars lander using its robotic arm-mounted, Instrument Deployment Camera is seen on Mars, Nov 30, 2018. [Photo/Agencies]
An expo visitor is helped to try a comb at a British booth at the expo. [Photo by Gao Erqiang/chinadaily.com.cn]
