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5th World Intelligence Congress kicks off in Tianjin

By Ma Si and Yang Cheng in Tianjin | chinadaily.com.cn | Updated: 2021-05-20 15:03
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A wireless-powered low-floor tram model is exhibited by CRRC Corporation Limited booth in Tianjin on May 20, 2021. [Photo by Jia Lei/ chinadaily.com.cn]
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