HANGZHOU, April 4 (Xinhua) — With a sun hat made of solar panels, a tea-picking robot weaves through rows of renowned Longjing tea bushes in Hangzhou\’s West Lake scenic spot, east China\’s Zhejiang Pr
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HANGZHOU, April 4 (Xinhua) — With a sun hat made of solar panels, a tea-picking robot weaves through rows of renowned Longjing tea bushes in Hangzhou\’s West Lake scenic spot, east China\’s Zhejiang Pr