Shanghai police say two 17-year-olds were placed in "administrative detention" following the incident at a restaurant where diners simmer food at their own tables.

We fully understand that the distress caused to our customers by this incident cannot be fully compensated for by any means,'

Haidilao has apologised to customers, saying it has replaced all hotpot equipment and dining utensils, as well as disinfecting other crockery and utensils. The incident happened late in February, though the company's management only found out about it days later,