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Models present jewellery during a fashion show at the 2019 edition of BaselWorld in Basel, Switzerland, March 21, 2019. The 2019 edition of BaselWorld, the world's biggest annual watch and jewelry fair, opened its doors to the public on Thursday, with exhibitors, show managers and industry experts looking forward to a future-oriented transformation of the show in the digital world. (Xinhua/Xu Jinquan)