Chinese authorities have summoned representatives of US-based membership-only retailer Sam’s Club for a “formal accountability interview” in response to “frequent food safety issues”, the State Administration for Market Regulation (SAMR) announced on Monday.According to a notice from the regulator, the Walmart-owned supermarket chain was urged to “prioritise food safety, strictly fulfil social corporate responsibilities, mitigate risks across the entire supply chain and safeguard public health”...