China's food regulator has visited 600 fast food outlets and food distributors over fears out-of-date or rotten meat is being sold for consumption, the watchdog said in a statement.
Big chains like McDonald's, Starbucks and KFC-parent group Yum Brands Inc have already been dragged into the safety scare.
The investigation comes after five people from OSI Group, the US parent of China-based meat-processing factory at the center of the incident, were arrested. Yum has now severed ties with the group.
More top news
ATM machines were affected, while people also reported problems using cards in shops.
Representative Darrell Issa, who is from California, has said there should be a special prosecutor investigating Russian hacking and Trump.
Officers wanted to know whether he and his mother were Muslim or not, according to his lawyer.