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A visitor looks at an indoor delivery robot during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21. (Xinhua/Ren Chao)
2019 World 5G Convention to open in Beijing
Source: Xinhua| 2019-11-21 07:45:00|Editor: Wang Yamei
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