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People look at window cleaning robots at the Sci-tech Life exhibition area during the second China International Import Expo (CIIE) in Shanghai, east China, on Nov. 6, 2019. (Xinhua/Jin Liwang)
People visit Sci-tech Life exhibition area during 2nd CIIE
Source: Xinhua| 2019-11-07 22:23:59|Editor: mingmei
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