Chinese customs officers have stopped hundreds of thousands of fake FIFA World Cup products from leaving the country as counterfeiters tried to make money from the international sporting event. Counterfeit goods, mainly footballs and sports clothing, were seized by Customs in Guangzhou, Shanghai and Yiwu, the world’s biggest wholesale market, ahead of the start of the World Cup in Russia.

China News Service reported that Guangzhou Customs impounded more than 7,800 fake FIFA products, all from one manufacturer and destined for Tanzania. Huangpu Customs, also in Guangzhou, seized 4,500 World Cup-Adidas soccer shirts mixed with a shipment of unbranded shirts. In Shanghai, Customs officials have discovered more than 130,000 items that allegedly infringed on the intellectual property rights of the World Cup. In one major case, nearly 2,500 “Russia 2018” footballs made in Nanjing were seized in mid-April before they could be shipped to Columbia through Yangshan port in Shanghai.

Hundreds of knock-off footballs were also impounded in Yiwu, Zhejiang province, in what was the 12th Fifa IPR raid by Hangzhou Customs this year. The dozen cases netted roughly 32,000 counterfeits combined. World Cup-related products are among the bestsellers on Yiwugou.com, the Yiwu commodities market’s online platform. More than 100 million of the top four products, all small flags of finalists in the event, have been sold in the past month. Chinese companies are also spending big on the event, signing up as either partners, sponsors or regional supporters, including Wanda Group, Mengniu, Hisense and Vivo, the South China Morning Post reports.