Which company holds the Guinness World Record for the largest product launch event ever held, with over 100,000 people attending the unveiling of their new smartphone line in 2017?

The world of retail is full of impressive records - from the most successful advertising campaigns to the biggest store openings. Test your knowledge about the extraordinary marketing achievements that have earned companies spots in the record books. Can you identify which retail giant holds this remarkable world record?

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Apple
Xiaomi
Samsung
Huawei