Chinese regulators have clamped down on medical ads on China’s leading search platform, Baidu, following the death of a 21-year-old cancer patient who undertook experimental therapy from a hospital advertised on Baidu’s platform.

The new restrictions require Baidu to add visual markers on advertisements as well as “warnings” on paid content. The search engine is also now required to limit advertisements to less than 30 percent of displayed results.

The company’s stock has fallen just under 3 percent since the announcement on Monday afternoon.

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Cate Cadell

Cate is a tech writer. She worked as a journalist in Australia, Mongolia and Myanmar. You can reach her (in Chinese or English) at: @catecadell or catecadell@technode.com