One of China’s biggest beermakers says it has opened an investigation after a video appearing to show a factory employee urinating on raw ingredients went viral this week.

The clip, published online on Thursday (Oct 19), purportedly shows a male worker at a Tsingtao Brewery warehouse clambering into a high-walled container and relieving himself onto its contents.

The footage circulated widely on Chinese social media, racking up tens of millions of views on the popular platform Weibo.