The world’s biggest online retailer – China’s Alibaba – has been hit with a record fine equivalent to $2.75bn (just over £2bn).
Regulators in China said the internet giant had abused its dominant market position for several years.
In a statement the company said it accepted the ruling and would “ensure its compliance”.
Analysts say the fine shows China intends to move against internet platforms that it thinks are too big.
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While not well known outside China, inside the country Alibaba is an ever-present behemoth, the BBC’s Robin Brant reports from Shanghai.
The company is China’s Amazon meets eBay, our correspondent says. Retail is its main activity but its work has spread to digital payments, credit and cloud computing.
The fine amounts to 4% of Alibaba’s revenue in 2019.
Regulators say Alibaba restricted competition by stopping some sellers using other platforms.
It is the latest in a chain of events targeting the company that kicked off last October, just after its high-profile co-founder, Jack Ma, told a gathering of China’s leading regulators that they were stifling innovation.
Jack Ma is well-known in China as one of the country’s most successful entrepreneurs.