2 Min Read FILE PHOTO: An app of the Chinese discount online retailer Vipshop Holdings Ltd is seen on a mobile phone in this illustration picture taken December 18, 2017. REUTERS/Florence Lo/Illustration SHANGHAI (Reuters) - Chinese regulators have hit online discount retailer Vipshop Holdings Ltd with a 3 million yuan ($464,000) fine, the biggest to date in a recent clampdown on anti-competitive behaviour among internet firms. In a sign that regulators are increasingly willing to use more tools in a newfound zeal to rein in monopolistic behaviour in the tech sector, Vipshop was punished for violations of a law prohibiting unfair competition, which allows for fines of up to 5 million yuan.